Vulkaanuitbarsting bij Canarische Eilanden #4

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Recordaantal aardbevingen op Canarisch eiland

Nog nooit eerder werden er zoveel aardbevingen achter elkaar geregistreerd op het kleine vulkanische eilandje El Hierro, het kleinste van de Canarische Eilanden. De reeks van maar liefst 720 bevinkjes heeft de overheid van deze eilandengroep voor de kust van West Afrika ertoe doen besluiten om voor het eerst in de geschiedenis een vergadering bijeen te roepen van het Stuurcomité van Vulkanische Monitoring. Dit comité werd opgericht om specifieke plannen te realiseren, die de burgerbevolking dienen te beschermen en noodplannen voor vulkanische risico’s moeten ontwikkelen. Inmiddels wordt gesproken over een ‘significante dreiging van seismische activiteit’.

Het Nationaal Geografisch Instituut (IGN) en het Volcanologische Instituut van de Canarische eilanden blijft nauwlettend de aardbevingen in de gaten houden, waarvan de kracht van de bevingen (elke dag!) ligt tussen de 1 en 3 op de Richterschaal. De meerderheid van de bevingen vindt plaats tussen 5 en 15 km diepte.

Volgens de autoriteiten betekent deze seismische activiteit nog niet direct dat een grotere, significante aardbeving zal plaatsvinden. Het merendeel van de bevingen die zijn geregistreerd, vonden plaats in het Noord Westen van het 280 vierkante kilometer kleine eilandje, bij het plaatsje El Golfo (zie foto hieronder). Een aardbeving op deze plaats zorgde er zo’n 50.000 jaar geleden voor, dat er een enorme landverschuiving plaatsvond, waarbij de helft van de vulkaan in zee gleed. Hierdoor ontstond een ca. 100 meter hoge tsunami die naar de overzijde van de Atlantische oceaan zou zijn gegleden. Schuin tegenover dit eilandje, in het verlengde van de resterende halve kratermond, ligt het Noord Amerikaanse continent..

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El Hierro Earthquake Swarm Enters Third Week
The intensity of earthquakes recorded on the smallest of the Canary Islands, El Hierro, has increased slightly during the last 24 hours. However, the total number of earthquakes recorded daily has lessened since the earthquake swarm initially began on 17 July.

The total number of tremors recorded during the past two weeks has now exceeded 1,050, according to the Instituto Geografico Nacional (IGN).

The majority of the earth tremors ranged between 1-2 magnitude, but during the past 24 hours there have been least five tremors measuring in excess of 2.0 magnitude on the Richter Scale. A 2.4 magnitude earthquake was recorded at 4:56 p.m. local time on Sunday (31 July 2011).

Approximately 50 earth tremors were recorded on Sunday, according to local earthquake monitoring agency Actualidad Volcánica de Canarias (AVCAN). The number is slightly down on the number of tremors recorded on Saturday and significantly less than the 195 earthquakes recorded on 22 July.

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The vast majority of the tremors have been recorded in the northwest of the 278.5-square-kilometre island at El Golfo, the location of a massive landslide that created a 100-metre high tsunami almost 50,000 years ago.

The earthquake swarm, prompted the Canary Islands Government to convene the first ever meeting on 22 July of the Steering Committee and Volcanic Monitoring, reflected in the Specific Plan Protection Civil and Emergency for Volcanic Risk, given what it described “the significant increase in seismic activity”. The Committee met again on Friday 29 July to discuss the low magnitude seismic activity. It reported that it had stepped up its seismic monitoring operations to identify the source of the earthquakes.

Following an evaluation of seismic and volcanological information gathered by the IGN and volcanological Institute of the Canary Islands, the Committee agreed to activate “monitoring and surveillance mechanisms necessary to coordinate the actions of civilian self-protection and information to people listed in the Plan” (translated from Spanish press release). It remains unclear, however, if the unprecedented seismic activitiy on El Hierro is a precursor to a possible future increase in earthquake or volcanic activity.

Earthquake swarms are events where a local area experiences sequences of many earthquakes striking in a relatively short period of time. The length of time used to define the swarm itself varies, but the United States Geological Survey (USGS) points out that an event may last for days, weeks, or months.

El Hierro’s Volcanic/Seismic Past

El Hierro is situated in the most southwestern extreme of the Canaries. The island was formed after three successive eruptions, and consequent accumulations, the island emerged from the ocean as an imposing triangular pyramid crowned by a volcano more than 2,000 metres high.

The volcanic activity, principally at the convergence of the three ridges, resulted in the continual expansion of the island. A mere 50,000 years ago, as a result of seismic tremors which produced massive landslides, a giant piece of the island cracked off, crashed down into the ocean and scattered along the seabed. This landslide of more than 300km3 gave rise to the impressive amphitheatre of the El Golfo valley and at the same time caused a tsunami that most likely rose over 100 metres high and probably reached as far as the American coast.

Nuevas imágenes de la mancha de emisiones volcánicas en la costa de El Hierro

Material piroclástico en superficie tras la erupción de El Hierro. Día 15-10-2011

Imágenes de la erupción el día 17-10-2011 donde se aprecia el foco principal de la misma

Underwater volcano errupting of coast Canary Islands emits toxic gases

Birth of a new vent on November 23

El volcán de La Restinga, El Hierro.

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NOTE AVCAN 427 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 22 January 2012-12:30 h peninsular - seismic-volcanic activity remains moderate, one in the mountain area east of Tanganasoga, two in the Julan and one in the Llanillos , also with some of seismicity detected but not localized.

Continued volcanic tremor signal in the eruption of the Restinga, and seems to follow cycles d ... and a 12-18h, coinciding with high tides and low tides so that when the tide up and down, having a variation in the water pressure, water enters the tube and becomes very unstable, with loud explosions hydromagmatic, making mincemeat ejecta and more stable at low tide where they exit from lava or pyroclastic balloons floating to the surface smoldering. On day 20 the highest tremor coincided with low tides, the 21 (day before yesterday), and change Yesterday's tremor Igua that coincided with high tides roughly, today has once again changed and coincided with low tide follows high tremor would be for the next low tide at 19:00 h. .. can not not be as simple

The magnitude of the earthquakes located between 1.6 and 0.3. New quakes 6. Profundidada 12, 13, 14, 15, 15 and 16km. Before yesterday 5. Yesterday 4. Today van 2. A total of 12,022 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

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The seismicity map of the last two weeks you can see the circular zone of seismicity of the past days with the strongest earthquakes in the peripheral zone. The two quakes today (Rosa) are ranked according to the prolongation of the NE-SW axis of the island in the Cala Tacorón and the Sea of las Calmas, prolongation active these last days as shown in the earthquakes of days before. Yesterday was the seismic shift in the west of Tanganasoga and Sabina, with 2 peaks in the area, 1 on the coast and another in the Gulf escarpment to the west.

Also be seen as 3 concentric arcs that begin in NS Direction to go turning to NNW-SSE to NW-SE, WNW-ESE and end EO curious and whose interpretation could be a dispersion of efforts by a feather mantle provocandos below the bark ... if so, your focus or center points to the border area to the point where deep seismicity has been detected the past 01 days, almost nothing (Enrique).

DAY 23 JAN EARTHQUAKES. - Rosa (2)
DAY 22 JAN EARTHQUAKES. - Blue (4)
EARTHQUAKES OF THE DAY 06 to 21 JAN. - Yellow (34)

New earthquakes detected and located yesterday and today by the IGN in the area of the island of El Hierro and vicinity since the last note AVCAN:
1119745 01/01/2012 12:17:54 27.7456 -17.9893 34 1.8 4 SE FRONTERA.IHI
1122704 22/01/2012 20:21:14 27.7139 -18.0735 12 0.3 4 SW FRONTERA.IHI
1122703 22/0 ...1/2012 20:35:32 27.7400 -18.1023 16 0.3 4 W FRONTERA.IHI
1122706 22/01/2012 21:21:45 27.7477 -18.0716 15 1.0 4 W FRONTERA.IHI
1122729 22/01/2012 22:14:19 27.7112 -18.0713 13 0.8 4 SW FRONTERA.IHI 12022
1120938 11/01/2012 03:07:01 27.7491 -18.0899 29 II 2.4 4 W FRONTERA.IHI
1122739 23/01/2012 05:39:21 27.6886 -18.0303 15 1.1 4 SW EL PINAR.IHI
1122740 23/01/2012 07:19:12 27.6570 -18.0587 14 1.6 4 SW EL PINAR.IHI
1122793 23/01/2012 11:12:17 27.7095 -18.0403 16 1.4 4 W EL PINAR.IHI

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Update 23/01 -11:57 UTC
As we see a more and more active jacuzzi area, we can start thinking of the new phase soon, the Surtseyan phase (when, is depending on the vent activity and can be from hours to weeks if the eruption continues like it goes now).
We want to stress however that based on the just happened Red Sea eruption, the distance from the vent to the coast would be safe enough to not damage La Restinga or any other part of the island. A Surtseyan phase will go normally gradually and with all the scientists aboard, people will have no risk at all.
Additionally IGN or INVOLCAN / ITER have not yet measured high concentrations of the typical eruption gases as yet) It would not surprise us to see it happening soon as the vent depth is reaching the point where the superheated steam pressure from below (magma (1100°C) /water interaction) can become bigger than the water column above it.
We have written it before, but it maybe good the repeat the Wikipedia description of the Surtseyan eruption : A Surtseyan eruption (or hydrovolcanic) is a type of volcanic eruption caused by shallow-water interactions between water and lava, named so after its most famous example, the eruption and formation of the island of Surtsey off the coast of Iceland in 1963. Surtseyan eruptions are the wet equivalent of ground-based Strombolian eruptions, but because of where they are taking place, they are more explosive (ER read : steam and ash columns). This is because as water is heated by lava, it flashes in steam and expands violently, fragmenting the magma it is in contact with into fine-grained ash.
- Joke has just reported (you may have seen it on the webcam) that the Guardia Civil /Involcan helicopter was hanging close to the vent measuring gases and temperatures.

VUELO CIENTÍFICO INVOLCAN - GC 230112 - VOLCÁN SUBMARINO DEL HIERRO - CENIZAS Y GASES - I

VUELO CIENTÍFICO INVOLCAN - GC 230112 - VOLCÁN SUBMARINO DEL HIERRO - CENIZAS Y GASES - II

VUELO CIENTÍFICO INVOLCAN - GC 230112 - VOLCÁN SUBMARINO DEL HIERRO - DESGASIFICACIÓN VOLCÁNICA

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Update 23/01 – 23:58 UTC
The video above made by the Involcan / Guardia Civil has been recorded this morning while the jacuzzi was still very strong. It shows 2 different vents separate from each other, a new phenomenon as far as the last couple of days and weeks.

Update 23/01 – 23:55 UTC
- An 8th earthquake happened at 23:05. The earthquake had a magnitude of 1.1 (depth unknown at the moment). Epicenter here
- Harmonic tremor minimal but surviving. Very hard to say what will happen next.

Update 23/01 – 22:55 UTC
- Harmonic tremor came again to life at 20:43 UTC and is still surviving a little bit at the time of writing this update. Just as this morning we see regular strong hydromagmatic bursts.
- 3 more earthquakes later today , making it a total of 7 earthquakes today !
23/01/2012 15:12:28 27.7501 -18.0543 13 1.3 4 W FRONTERA.IHI
23/01/2012 15:44:08 27.7565 -18.0286 5 0.6 4 W FRONTERA.IHI
23/01/2012 20:20:35 27.6701 -18.0068 26 1.4 4 SW EL PINAR.IHI

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DAY 23 JAN EARTHQUAKES. - Pink (6)
DAY 22 JAN EARTHQUAKES. - Blue (4)
EARTHQUAKES OF THE DAY 06 to 21 JAN. - Yellow (34)

Earthquakes Today, three new, noteworthy that near Frontera, rose above the right of 0.6 to 5.1 km and the two alignments NE-SW and NNW-SSE ...

1122739 23/01/2012 05:39:21 27.6886 -18.0303 15 1.1 mbLg SW EL PINAR.IHI - El Hierro
1122740 23/01/2012 07:19:12 27.6570 -18.0587 14.2 1.6 mbLg SW EL PINAR.IHI - El Hierro
1122793 23/01/2012 11:12:17 27.7095 -18.0403 15.5 1.4 mbLg W EL PINAR.IHI - El Hierro
1122839 23/01/2012 12:21:17 27.6650 -18.0512 11.8 1.5 mbLg SW EL PINAR.IHI - El Hierro
1122875 23/01/2012 15:12:28 27.7501 -18.0543 12.7 1.3 mbLg W FRONTERA.IHI - El Hierro
1122878 23/01/2012 15:44:08 27.7565 -18.0286 5.1 0.6 mbLg W FRONTERA.IHI - El Hierro

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NOTE AVCAN 428 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 24 January 2012-12:00 h peninsular - seismic-volcanic activity remains moderate earthquakes located over having no sign of tremor, with today's summit area Tanganasoga east of, and yesterday in a NS strip through the same area, with some seismicity detected but not localized. Continued volcanic tremor signal in the eruption of the Restinga, alternating tremor peridos with low and quiet with periods where it is very unstable, with loud explosions hydromagmatic and ups and downs, went up yesterday and this morning has stopped and has been in the last hours minimum. Magnitude between 1.5 and 0.3. New earthquakes 10. Profundidada 12 and 13km (5.1km and one and two at 15.5 and 25.8km). The day before yesterday 4. Yesterday 8. Today van 4. A total of 12,032 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique)

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NOTE AVCAN 429 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 25 January 2012-11:45 h peninsular - seismic-volcanic activity remains moderate earthquakes located over having no sign of tremor, today one in the Cala Tacorón and two more in the mountain area south of Tanganasoga, and yesterday the same area, further east in the interior of the island continues volcanic tremor signal in the eruption of the Restinga is declining but remains alternating peridos with low and quiet tremor with periods where it is more unstable, with loud explosions hydromagmatic and ups and downs, went up yesterday and this morning has rebounded somewhat the down after 5:55 pm. Magnitude between 1.6 and 0.5. New earthquakes 5. Profundidada 12 and 13km. Before yesterday 8. Yesterday 6. Now go 3. A total of 12,037 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).


DAY 25 JAN EARTHQUAKES. - Green (3)
DAY 24 JAN EARTHQUAKES. - Green (6)
DAY 23 JAN EARTHQUAKES. - Pink (8)
DAY 22 JAN EARTHQUAKES. - Blue (4)
EARTHQUAKES OF THE DAY 06 to 21 JAN. - Yellow (34)

The seismicity map of the last two weeks you can see the circular zone of seismicity of the past days with the strongest earthquakes in the peripheral zone. Earthquakes today (red) with an area of Cala Tacorón and two more in the mountain area south of Tanganasoga, and yesterday (green) night the same area, further east in the interior of the island, area east of Tanganasoga peaks, all within the island. The day before yesterday earthquakes (Rosa) NS line and according to the prolongation of the NE-SW axis of the island in the Cala Tacorón and the Sea of Calm, and active in recent days prolongation NNW-SSE as can earthquakes seen in the previous days.

detected and located yesterday and today by the IGN in the area of the island of El Hierro and vicinity since the last note AVCAN:

1123227 24/01/2012 20:29:26 27.6866 -18.0398 13.5 1.6 mbLg SW EL PINAR.IHI
1123251 24/01/2012 23:28:05 27.6799 -18.0390 12.8 1.2 mbLg SW EL PINAR.IHI
1123295 25/01/2012 04:08:11 27.6980 -18.0631 12.0 1.1 mbLg W EL PINAR.IHI

1123296 25/01/2012 04:09:48 27.7104 -18.0627 13.4 0.9 mbLg SW FRONTERA.IHI
1123344 25/01/2012 05:00:40 27.6638 -18.0352 13.2 0.5 mbLg SW EL PINAR.IHI

VUELO CIENTÍFICO INVOLCAN - GC 230112 - VOLCÁN SUBMARINO DEL HIERRO - MANCHA MARINA - PANCAM I

VUELO CIENTÍFICO INVOLCAN - GC 230112 - VOLCÁN SUBMARINO DEL HIERRO - MANCHA MARINA - PANCAM II

VUELO CIENTÍFICO INVOLCAN - GC 230112 - VOLCÁN SUBMARINO DEL HIERRO - CENIZAS Y GASES - PANCAM II

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Update 25/01 – 10:51 UTC
- a bit late today for our first reporting due to an earthquake close to Parma in Northern Italy
- jacuzzi waters strong and a minor harmonic tremor. As we have seen many times before, there seems to be NO direct relation in between HT and the activity at the surface during the normal ongoing submarine eruption. Only the violent phase during the beginning of November was an exception on this.
- have you seen the VERY BIG magma stone in the jacuzzi waters. This block must be meters wide !, almost like a rocK We know the proportion since the blocks we saw a few weeks ago looked minor on the webcam and and where 1.5 meter tall !
- 3 earthquakes so far today. The earthquakes are showing the continuous pressure of the magma against the volcano cone of El Hierro. The magma seeks openings everywhere and is pressing against crevasses, lava tubes etc.

Update 25/01 13:14 UTC
- Ann-Kristin made the remarkable webcam capture : A men/woman walking on the jacuzzi !

2012 01 24 11 27 09

2012-01-25_13-49-40.avi

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NOTE AVCAN 430 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 26 January 2012-10:45 h peninsular - seismic-volcanic activity remains moderate to high, with more earthquakes located to be any sign of tremor in the Sea of las Calmas, Cala area Tacorón and southeast of the island quite microseismicity also detected but not localized tonight, after the earthquake of 2.8 aparecenal least two long-period events or LP, indicating depressurization of fluids and magma movement and is clearly seen in the figure of the spectrogram.

Continued volcanic tremor signal in the eruption of the Restinga, and even decreases while still alternating periods with low and quiet tremor with periods where it is more unstable, with loud explosions and many ups and downs hydromagmatic yesterday morning and went up to continued until 16:40 h and this morning has rebounded somewhat the down after 5:20 pm.

Magnitude between 2.8 and 1.0. New quakes 7. 2 felt earthquakes with intensity II. Depth between 12 and 13km. Before yesterday 6. Yesterday 8. Today van 2. A total of 12,044 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).


New earthquakes detected and located yesterday and today by the IGN in the area of the island of El Hierro and vicinity since the last note AVCAN:
1123472 25/01/2012 13:00:54 27.6629 -18.0044 12.8 1.6 4 SW EL PINAR.IHI
1123504 25/01/2012 17:01:35 27.6401 -18.0339 13.5 II 2.5 4 SW EL PINAR.IHI
1123505 25/01/2012 17:06:01 27.6280 -18.0333 13.9 1.8 4 SW EL PINAR.IHI 12040

1123513 25/01/2012 19:19:10 27.6908 -18.0345 12.3 1.2 4 SW EL PINAR.IHI
1123512 25/01/2012 20:22:34 27.6722 -18.0295 12.4 II 2.8 4 SW EL PINAR.IHI

1123531 26/01/2012 01:53:50 27.6990 -18.0276 13 1.0 4 W EL PINAR.IHI
1123586 26/01/2012 07:18:45 27.6650 -18.0308 12 1.0 4 SW EL PINAR.IHI

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AVCAN
A deep earthquake of 1.9 at 19:49 at 23km in the Gulf, then we have an LP at 17:49, another 1.0 to 16km sismito in Pinar and then two, curiously have been becoming more shallow, and some but not finally located and tremor resurrects and comes back at about 19:46 that evening we are completita ... I leave the map of the earthquakes that we have today (Enrique).

1123677 26/01/2012 16:49:12 27.7512 -18.0694 23.3 1.9 W FRONTERA.IHI mbLg
1123678 26/01/2012 17:56:05 27.7074 -18.0472 15.6 1 mbLg W THE PINAR.IHI
1123684 26/01/2012 19:02:45 27.6674 -18.0590 14.5 1.5 SW mbLg PINAR.IHI
1123685 26/01/2012 19:19:57 27.7050 -18.0686 14.2 0.6 W THE PINAR.IHI mbLg

DAY 26 JAN EARTHQUAKES. - Dark Blue (6)
EARTHQUAKES OF THE DAY JAN 23 to 25. - Yellow (22)

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NOTE AVCAN 431 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 27 January 2012-10:00 h peninsular - seismic-volcanic activity continues to moderate, with more earthquakes located microseismicity and having no sign of tremor, located from the coast and border peaks in the area of Cala Tacorón through the Julan and one in the Sea of las Calmas. Also tonight quite microseismicity detected but not localized. Continued volcanic tremor signal in the eruption of the Restinga, and even decreases while still alternating periods with low and quiet tremor with periods where it is more unstable, with loud explosions and many ups and downs hydromagmatic yesterday afternoon by La rose from 19:49 h o'clock and this morning has stopped. Magnitude between 2.0 and 0.4. New earthquakes 12. Depth between 10.5 and 15.6km (and another one at 9.5 and 23.3km). Before yesterday 8. Yesterday 6. Now go 8. A total of 12,056 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).


DAY 27 JAN EARTHQUAKES. - Red (8)
DAY 26 JAN EARTHQUAKES. - Dark Blue (6)
EARTHQUAKES OF THE DAY JAN 23 to 25. - Yellow (22)

Today Earthquakes accumulate in Julan area and two Border and coincides with one of yesterday along the coast. You will see a series of alignments CalaTacorón EO against entering land and other axis NS and NNW-SSE.

1123677 26/01/2012 16:49:12 27.7512 -18.0694 23.3 1.9 mbLg W FRONTERA.IHI

1123678 26/01/2012 17:56:05 27.7074 -18.0472 15.6 1.0 mbLg W EL PINAR.IHI
1123684 26/01/2012 19:02:45 27.6674 -18.0590 14.5 1.5 mbLg SW EL PINAR.IHI
1123685 26/01/2012 19:19:57 27.7050 -18.0686 14.2 0.6 mbLg W EL PINAR.IHI
1123698 27/01/2012 01:02:27 27.6664 -18.0195 11.7 0.9 mbLg SW EL PINAR.IHI
1123723 27/01/2012 02:13:41 27.6889 -18.0475 12.9 0.9 mbLg SW EL PINAR.IHI 12050

1123727 27/01/2012 04:24:53 27.6967 -18.0378 12.8 2.0 mbLg W EL PINAR.IHI
1123729 27/01/2012 06:27:16 27.6936 -18.0435 10.5 0.4 mbLg W EL PINAR.IHI
1123730 27/01/2012 06:27:45 27.7065 -18.0425 11.2 0.4 mbLg W EL PINAR.IHI
1123732 27/01/2012 06:57:15 27.7537 -18.0703 14.6 0.7 mbLg W FRONTERA.IHI
1123733 27/01/2012 07:39:10 27.6662 -18.0715 9.5 0.4 mbLg SW EL PINAR.IHI

1123735 27/01/2012 07:55:53 27.7478 -18.0693 15.5 0.5 mbLg W FRONTERA.IHI

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[bron] ^{19:00 uur}
Today we are going and for the 12 earthquakes, 4 more than the last part .. a sismito to 10.5 under Frontera and the truth is that earthquakes are making the area very well magma conduit through the fault, fissure or dike from the el Golfo area, passing under the Tangansoga (an earthquake at 10.5km ) NNW-SSE direction towards SSE passes the mountain area (an earthquake there at 19km), the Julan and will end in the eruption of the Restinga, which returns to bubbling and activity since the tremor was resumed last two in the afternoon ... and for dessert the ship Salvamar by bubbling area a few minutes ago. (Enrique).

DAY 27 JAN EARTHQUAKES. - Red (12)
DAY 26 JAN EARTHQUAKES. - Dark Blue (6)
EARTHQUAKES OF THE DAY JAN 23 to 25. - Yellow (22)

1123739 27/01/2012 09:18:10 27.6995 -18.0699 11.8 0.9 mbLg W EL PINAR.IHI - El Hierro
1123834 27/01/2012 14:14:06 27.7629 -18.0267 10.5 1.1 mbLg W FRONTERA.IHI - El Hierro
1123836 27/01/2012 15:16:34 27.7155 -18.0528 19 0.9 mbLg SW FRONTERA.IHI - El Hierro
1123843 27/01/2012 16:41:33 27.7326 -18.0573 14.8 0.5 mbLg SW FRONTERA.IHI - El Hierro

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NOTE AVCAN 433 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 29 January 2012-12:45 h peninsular - seismic-volcanic activity remains moderate, with more earthquakes located microseismicity and having no sign of tremor, located from the coast and Frontera peaks in the area of ​​Cala Tacorón through the Julan and one in the Sea of las Calmas. Today is located further west. Also tonight quite microseismicity detected but not localized. Continued volcanic tremor signal in the eruption of the Restinga, and even decreases while still alternating periods with low and quiet tremor with periods where it is more unstable, with loud explosions and hydromagmatic ups and downs. Keep coming and smoldering pyroclastic floating in the sea at the moment is the most obvious statement that the volcano continues to erupt. Magnitude between 2.4 and 0.6. New earthquakes 18. Depth between 10.2 and 16km (and two to 19 and 22km). The day before yesterday 12. Yesterday 9. Now go 9. A total of 12,078 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 29 JAN EARTHQUAKES. - Pink (9)
DAY 28 JAN EARTHQUAKES. - Light green (9)
DAY 27 JAN EARTHQUAKES. - Red (12)
DAY 26 JAN EARTHQUAKES. - Dark Blue (6)
EARTHQUAKES OF THE DAY JAN 23 to 25. - Yellow (22)

The earthquakes of today are further west aligned in the NNW-SSE Direction from Sabine to the Sea of las Calmas through the high mountain area. Yesterday was more in the Julan and sea area of the eruption to the area las Calmas. before yesterday accumulate in Julan area and two Border and coincides with one of yesterday along the coast. You will see a series of alignments against Cala Tacorón EO entering land and other axis NS and NNW-SSE.

New earthquakes detected and located yesterday and today by the IGN in the area of the island of El Hierro and vicinity since the last note AVCAN:
1123906 28/01/2012 11:57:37 27.6780 -18.0413 10.2 1.1 mbLg SW EL PINAR.IHI
1123907 28/01/2012 15:00:16 27.7203 -18.0643 12.6 0.6 mbLg SW FRONTERA.IHI
1123908 28/01/2012 16:44:07 27.7182 -18.0368 11.5 1.6 mbLg SW FRONTERA.IHI
1123918 28/01/2012 17:40:54 27.6363 -18.0294 11.1 1.7 mbLg SW EL PINAR.IHI
1123919 28/01/2012 17:55:09 27.6972 -18.0425 14.8 1.2 mbLg W EL PINAR.IHI

1123923 28/01/2012 21:29:42 27.6570 -18.0484 11.0 1.6 mbLg SW EL PINAR.IHI
1123927 28/01/2012 21:30:20 27.7005 -18.0434 12.0 0.7 mbLg W EL PINAR.IHI
1123925 28/01/2012 22:44:36 27.6767 -18.0335 14.2 1.1 mbLg SW EL PINAR.IHI
1123926 28/01/2012 23:03:33 27.6856 -18.0586 14.0 0.9 mbLg SW EL PINAR.IHI

1123933 29/01/2012 00:16:21 27.6695 -18.0764 22 1.2 4 SW EL PINAR.IHI 12070

1123934 29/01/2012 00:24:36 27.6312 -18.0475 14 2.4 4 SW EL PINAR.IHI
1123940 29/01/2012 01:10:39 27.7139 -18.0615 12 1.3 4 SW FRONTERA.IHI
1123941 29/01/2012 01:10:20 27.7303 -18.0744 14 1.0 4 SW FRONTERA.IHI
1123943 29/01/2012 02:08:05 27.6820 -18.0654 12 1.2 4 SW EL PINAR.IHI
1123944 29/01/2012 06:50:19 27.7670 -18.0883 13 0.7 4 W FRONTERA.IHI

1123946 29/01/2012 07:31:33 27.7239 -18.0659 14 0.9 4 SW FRONTERA.IHI
1123945 29/01/2012 07:52:06 27.7328 -18.0874 19 1.1 4 W FRONTERA.IHI
1123947 29/01/2012 08:25:24 27.7171 -18.0653 16 1.1 4 SW FRONTERA.IHI

quote:

The volcano ejected lava fragments up to 3 meters

From early yesterday morning was seen an area with abundant emission output of smoking material. In a departure from the Salvamar Adhara Inspection, Marine Salvage, there is abundant emission of lava fragments of large size, some of them more than 3 meters, which explode violently before sinking.

DIARIOELHIERRO.ES, writing (01.29.2012. 11:35 pm)
The volcano has returned to remove large chunks of lava to the surface of the sea calms. From early yesterday morning, Saturday, a high transmission area with plenty of material out steaming.

In a departure from the Salvamar Adhara inspection, Maritime deSalvamento, there was abundant emission of lava fragments of large size, some of them more than 3 meters, which explode violently before sinking.

About 12 hours begins to decay at the surface emission and evening shows only slight bubbling ring.

quote:

The INVOLCAN shows a shift in the diffuse emission of CO2 by the volcano island of El Hierro

From mid-January is a slight upward trend in carbon dioxide emissions reached 904 ± 30 tonnes per day

Scientists at the Institute of Technology and Renewable Energies (ITER), an agency of the Cabildo of Tenerife, and is now part of volcanological Institute of the Canaries (INVOLCAN) have reported to management of the Civil Protection Special Plan for Volcanic Risk Canary Islands (PEVOLCA) that are registering a change of trend in the diffuse emission of carbon dioxide (CO2) into the atmosphere by the volcano island of El Hierro in the second half of January, reaching the 904 ± 30 tons per day in late January. This change in trend is observed after a downward trend of the diffuse emission of carbon dioxide (CO2) into the atmosphere by the volcano island of El Hierro since late November, when it came to achieving the 2398 ± 115 tons per day until mid-January, when he came to record an emission rate of 661 ± 37 tonnes per day. To clarify that these values ​​refer to the emission of carbon dioxide (CO2) that occurs through the underwater eruption of El Hierro, but the amount of carbon dioxide (CO2) emitted to the atmosphere through the environment surface (soil-air interface) that makes up the 278 km2 area of ​​the Island Meridian.

To obtain these results are carried out scientific surveys, involving hundreds of diffuse flux measurements of carbon dioxide (CO2) made across the surface of the island of El Hierro, in order to investigate the spatiotemporal variations of the diffuse emission of carbon dioxide (CO2) into the atmosphere by the volcano island of El Hierro. The interest and importance of this work on diffuse emission of carbon dioxide (CO2) for volcanic surveillance because the information generated through these scientific surveys can not be obtained through permanent instrumental networks.

Other scientific reasons that support the interest of these jobs are supervisory role as a driving force gases from volcanic eruptions, which carbon dioxide (CO2) is the second major component of volcanic gases after water vapor and that the low solubility of carbon dioxide (CO2) in molten silicitados (magma) favor the escape of carbon dioxide (CO2) with ease of volcanic systems in depth.

These scientific surveys have failed to materialize due to MAKAVOL project "Capacity Building of R + D + i + d to contribute to the reduction of volcanic risk in the Macaronesia (MAC/3/C161)" which is being co-funded by the Transnational Cooperation Programme of the European Union Madeira-Canary-Azores (MAC 2007-2013) and the collaboration of the Island Councils of Tenerife and El Hierro.

INVOLCAN is an institution demanded unanimously by the Senate (2005), Parliament of the Canary Islands (2006) and House of Representatives (2009) with the aim of contributing to improving and optimizing the management of volcanic risk in Spain.


Picture Pie
Temporal evolution of the diffuse emission of carbon dioxide (CO2) in the island of El Hierro (red circles) recorded by the INVOLCAN and the daily number of earthquakes located above magnitude 1.7 by the National Seismic Network (IGN).

quote:

[AVCAN]
The sky in La Restinga, today at 18:44 facing west. A nice planetary alignment. ¿Or not will influence the behavior of the volcano? We will see or not see it, or just the opposite. (JR)

quote:

Update 29/01 – 23:35 UTC
- The number of earthquakes is rising day after day which is not good news for El Hierro and the scientists. Even with magma still flowing out of the main vent, the pressure is building below the island. 16 earthquakes is the highest number since many weeks.
Julio del Castillo Vivero has created a Google earth file showing the location and the magnitude of the earthquakes.


Update 29/01 – 02:48 UTC
- Harmonic tremor is holding well since it got stronger at 21/03 yesterday.
- Already 3 earthquakes today
30/01/2012 00:01 Depth 13 km M 1.0 SW EL PINAR
30/01/2012 00:31 Depth 13 km M 1.0 SW FRONTERA
30/01/2012 00:32 Depth 11 km M 1.3 W FRONTERA

quote:

NOTE AVCAN 434 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 30 January 2012-8:45 am peninsular - seismic-volcanic activity remains moderate, with more earthquakes located microseismicity and having no sign of tremor, located from the central Golfo area , from the high mountain area to the sea las calmas Continued volcanic tremor signal in the eruption of la Restinga, and even decreases while still alternating periods with low and quiet tremor with periods where it is more unstable and looks. The last one started last night just after 21:00 pm and am calmed. Keep coming and smoldering pyroclastic floating in the sea at the moment is the most obvious statement that the volcano continues to erupt. Magnitude between 1.4 and 0.6. New earthquakes 13. Depth between 11.0 and 14.2km (and one 15.2km). The day before yesterday 12. Yesterday 9. Now go 9. A total of 12,091 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 30 JAN EARTHQUAKES. - Light Blue (6)
DAY 29 JAN EARTHQUAKES. - Rosa (16)
DAY 28 JAN EARTHQUAKES. - Light green (9)
DAY 27 JAN EARTHQUAKES. - Red (12)
DAY 26 JAN EARTHQUAKES. - Dark Blue (6)
EARTHQUAKES OF THE DAY JAN 23 to 25. - Yellow (22)

The earthquakes of today are the central area of the island, with one in the el Golfo Coast, 3 in the mountain area and two in the las Calmas Sea near the Julan. The earthquakes of the past are further west aligned in the NNW-SSE Direction from Sabine to the Sea of las Calmas through the high mountain area. Day before yesterday was more in the area of Julan and las Calmas Sea to the area the eruptive. before yesterday accumulate in Julan area and two in Frontera and coincides with one of the previous day along the coast. You will see a series of alignments against Cala Tacorón EO entering land and other axes NS, NE-SW, NNE-SSW and NNW-SSE.

1123950 29/01/2012 14:12:38 27.7747 -18.0217 15.2 0.7 mbLg NW FRONTERA.IHI
1123951 29/01/2012 15:58:53 27.7450 -18.0554 12.0 1.0 mbLg W FRONTERA.IHI 12080

1123952 29/01/2012 19:23:24 27.6796 -18.0514 14.2 1.1 mbLg SW EL PINAR.IHI
1123971 29/01/2012 19:26:14 27.6786 -18.0328 11.0 1.4 mbLg SW EL PINAR.IHI
1123972 29/01/2012 19:35:17 27.7050 -18.0569 14.3 0.8 mbLg W EL PINAR.IHI
1123973 29/01/2012 19:48:21 27.6944 -18.0383 12.2 1.0 mbLg W EL PINAR.IHI
1123975 29/01/2012 20:32:02 27.6818 -18.0454 13.3 0.6 mbLg SW EL PINAR.IHI

1123995 30/01/2012 00:01:50 27.6776 -18.0735 12.9 1.0 mbLg SW EL PINAR.IHI
1124004 30/01/2012 00:31:44 27.7150 -18.0918 13.3 1.0 mbLg SW FRONTERA.IHI
1124005 30/01/2012 00:32:36 27.7429 -18.0656 11.0 1.3 mbLg W FRONTERA.IHI
1124012 30/01/2012 03:14:29 27.7064 -18.0562 12.6 1.0 mbLg W EL PINAR.IHI
1124010 30/01/2012 03:34:14 27.7123 -18.0483 12.0 1.3 mbLg W EL PINAR.IHI 12090

1124040 30/01/2012 06:02:41 27.6800 -18.0411 12.3 0.8 mbLg SW EL PINAR.IHI

quote:

Update 30/01 – 13:40 UTC
- Strong activity at the eruption site now, with many SLS coming out to the surface, while harmonic tremor remains at low levels.

quote:

Update 31/01 07:00 UTC
- 5 earthquakes since midnight UTC. The 04:16 earthquake occurred very close to the main vent.
31/01/2012 02:53 Depth 12 km M 0.7 SW FRONTERA
31/01/2012 04:04 Depth 12 km M 1.6 W EL PINAR
31/01/2012 04:16 Depth 17 km M 1.1 SW EL PINAR
31/01/2012 04:58 Depth 12 km M 0.4 W FRONTERA
31/01/2012 05:30 Depth 16 km M 1.1 NW FRONTERA
- Harmonic tremor survives but only at minimal levels

quote:

NOTE AVCAN 435 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 31 January 2012-11:00 h peninsular - seismic-volcanic activity remains moderate, with more earthquakes located microseismicity and having no sign of tremor. Highlight 3 earthquakes aligned along the supposed eruptive area, the southernmost of 7.3km. Continued volcanic tremor signal in the eruption of la Restinga, and even decreases while still alternating periods with low and quiet tremor with periods where it is more unstable and looks. After a quiet morning, the tremor is rising in the last hours. Keep coming and smoldering pyroclastic floating in the sea at the moment is the most obvious statement that the volcano continues to erupt. Magnitude between 1.4 and 0.4. New earthquakes 13. Depth between 11.6 and 14.3km (7.3km and one and three little deeper to 16.1, 16.6 and 17.1km). The day before yesterday 12. Yesterday 9. Now go 9. A total of 12,091 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).


DAY 31 JAN EARTHQUAKES. - Red (8)
DAY 30 JAN EARTHQUAKES. - Light Blue (13)
DAY 29 JAN EARTHQUAKES. - Rosa (16)

The three earthquakes today in the NW-SE aligned eruptive, two in the el Golfo Sea and three in the mountain area, which must be added several yesterday in the same area, but broader in the central area of the island, and one in the Gulf Coast, 3 in the mountain area and two in the las Calmas sea near the Julan. The earthquakes are antesdeyer west aligned in the NNW-SSE Direction from Sabine to the Sea of las ​​Calmas through the high mountain area.

1124042 30/01/2012 06:33:54 27.7126 -18.0066 14.3 1.2 mbLg W EL PINAR.IHI
1124079 30/01/2012 08:09:18 27.7883 -18.0804 13.9 0.7 mbLg NW FRONTERA.IHI
1124082 30/01/2012 08:27:51 27.7421 -18.0111 13.3 1.0 mbLg SW FRONTERA.IHI
1124104 30/01/2012 11:00:16 27.7004 -18.0412 11.6 0.9 mbLg W EL PINAR.IHI

1124178 30/01/2012 16:42:42 27.7221 -18.0425 11.8 1.5 mbLg SW FRONTERA.IHI
1124183 30/01/2012 18:23:15 27.7070 -18.1082 16.6 1.7 mbLg SW FRONTERA.IHI
1124185 30/01/2012 19:09:55 27.7384 -18.0615 12.9 1.1 mbLg SW FRONTERA.IHI

1124198 31/01/2012 02:53:01 27.7195 -18.0690 12.1 0.7 mbLg SW FRONTERA.IHI
1124199 31/01/2012 04:04:42 27.7097 -18.0414 12.2 1.6 mbLg W EL PINAR.IHI 12100

1124200 31/01/2012 04:16:07 27.6196 -18.0201 17.1 1.1 mbLg SW EL PINAR.IHI
1124201 31/01/2012 04:58:45 27.7616 -18.0557 11.7 0.4 mbLg W FRONTERA.IHI
1124202 31/01/2012 05:30:58 27.7887 -18.1167 16.1 1.1 mbLg NW FRONTERA.IHI
1124226 31/01/2012 06:01:07 27.7263 -18.0621 12.4 0.9 mbLg SW FRONTERA.IHI
1124225 31/01/2012 06:04:34 27.5968 -17.9692 7.3 0.7 mbLg S EL PINAR.IHI

1124224 31/01/2012 06:09:50 27.6398 -18.0573 - 0.5 mbLg SW EL PINAR.IHI

La Restinga 20120131 10:04 UTC - eruption stain, helicopter

quote:

Op woensdag 1 februari 2012 08:44 schreef Jumparound het volgende:
ik zie een beginnende tremor

VUELO CIENTÍFICO INVOLCAN - GC 310112 - VOLCÁN SUBMARINO DEL HIERRO - CENIZAS Y LAVA HUMEANTE- IV

quote:

NOTE AVCAN 436 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 01 FEBRUARY 2012-11:30 h peninsular - seismic-volcanic activity continues to moderate with quakes in the mountain area, the el Golfo and the Sea of las calmas, and some microseismicity not localized. Continued volcanic tremor signal in the eruption of the Restinga, and has fallen steadily to increase in general terms, alternating periods with low and quiet tremor with periods where it is more unstable and is, today has started to increase at about 7:00 am hydromagmatic explosions. After a quiet morning. Keep coming and smoldering pyroclastic floating in the sea at the moment is the most obvious statement that the volcano continues to erupt. Magnitude between 2.1 and 0.6. New earthquakes 9. Depth between 11.8 and 14.3km (and one 10.3km). The day before yesterday 13. Yesterday 14. Now go 3. A total of 12,116 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).


DAY 31 JAN EARTHQUAKES. - Light Green (3)
DAY 31 JAN EARTHQUAKES. - Red (14)
DAY 30 JAN EARTHQUAKES. - Light Blue (13)
DAY 29 JAN EARTHQUAKES. - Rosa (16)

Earthquakes today are three, the last in the sea of las calmas, and the other two in the el Golfo area, one on the ground and another at sea. NNW-SSE alignments Senotan the dorsal area south and normal alignment. Last night the activity concentrated in the area under the peaks and Tanganasoga, plus some in the Sea of las Calmas and frontera, among them very close to the NW-SE aligned eruptive To all these we must add several in the same area before yesterday, but the wider central area of ​​the island, and one in the Gulf Coast, 3 in the mountain area and two in the Calm sea near the Julan. The earthquakes of the day 29 are further west aligned in the NNW-SSE Direction from Sabine to the Sea of ​​Calm through the high mountain area.

1124420 31/01/2012 19:40:22 27.7370 -18.0175 11.8 1.3 mbLg SW FRONTERA.IHI
1124421 31/01/2012 21:22:26 27.7286 -18.0729 13.9 0.7 mbLg SW FRONTERA.IHI
1124422 31/01/2012 22:07:34 27.7116 -18.0476 13.7 0.7 mbLg W EL PINAR.IHI 12110

1124423 31/01/2012 22:13:36 27.7340 -18.0613 12.4 1.1 mbLg SW FRONTERA.IHI
1124424 31/01/2012 22:54:18 27.7261 -18.0643 12.6 1.2 mbLg SW FRONTERA.IHI
1124425 31/01/2012 23:04:56 27.6623 -18.0652 13.9 1.3 mbLg SW EL PINAR.IHI

1124427 01/02/2012 01:29:15 27.7694 -18.0649 13.7 0.8 mbLg W FRONTERA.IHI
1124428 01/02/2012 01:48:56 27.7414 -18.0108 10.3 0.6 mbLg SW FRONTERA.IHI

1124435 01/02/2012 06:51:47 27.6682 -18.0558 14.3 2.1 mbLg SW EL PINAR.IHI

quote:

THE SUBMARINE VOLCANO RESTINGA continues to erupt magmatic material to the surface.

02/01/2012 ... 12:32 - Ministry of Economy, Finance and Security

In yesterday were able to see different shades in the spot generated by the eruption

The submarine volcano continued to ejecting La Restinga magmatic material to the surface of the las Calmas Sea and off for the last few days.

From early morning yesterday, as confirmed by the National Geographic Institute, could be seen in the broadcast area the presence of ash generated in a central spot of brown and rings of different colors around it, surrounded by a large green area. As the day progressed, the area of ​​emission of ash decreased in size and greenish zone extended to the east. Throughout the day there was gas emissions and steaming lava fragments in the morning on an ongoing basis and in the evening intermittently.

In terms of seismicity, IGN yesterday located 13 earthquakes between magnitudes 0.7 and 1.7 and depths between 12 and 17 kilometers west of the island in the Gulf area and the Julan. On Monday, January 30, there were 14 movements with magnitudes between 0.4 and 1.6 on the Richter scale, in the same area at the same depth.

quote:

Eruptive swell in Restinga. No, now is not outpourings of balls. This is a wave produced in situ by the volcano, which must have won meters in height and comes to the surface very slowly. (JR)

Klik om te vergroten

La Restinga, El Hierro Waves at the Volcano 1st February

quote:

NOTE AVCAN 437 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - FEBRUARY 02 2012-12:00 h peninsular - seismic-volcanic activity continues to moderate, with seismicity located today in the western el Golfo Coast marine and yesterday in the Sea of las Calmas, and some non-localized microseismicity. Continued volcanic tremor signal in the eruption of the Restinga, which is increasing its activity, because since yesterday at 07:00 h restart has not stopped, as he had done the previous days, the explosion seems to have fallen somewhat , are less hydromagmatic explosions. La Mancha output produced by the underwater material is larger and this morning has gotten into the port of La Restinga. Magnitude between 1.6 and 0.9. New earthquakes 5. Depths to 10.1, 12.2, 12.5, 13.1 and 14.8km. The day before yesterday 14. Yesterday 5. Now go 3. A total of 12,121 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 02 FEB EARTHQUAKES. - Yellow (3)
DAY 01 FEB EARTHQUAKES. - Light Green (5)
DAY 31 JAN EARTHQUAKES. - Red (14)
DAY 30 JAN EARTHQUAKES. - Light Blue (13)
DAY 29 JAN EARTHQUAKES. - Rosa (16)

Earthquakes today are three in the el Golfo area, aligned NW-SE, from the coast toward the front of the Tanganasoga NW. The seismicity forms a spiral, with three distinct NNE-SSW alignment, NS and NNW-SSE from all the Tanganosoga and two arms, one to the north towards the W in the area where the swarm began and another in the south to eruptive area. It also highlights other alignments in the direction WNW-ESE in the line of summits and on the coast of Julan.

1124573 01/02/2012 19:04:30 27.6818 -18.0607 12.5 1.6 mbLg SW EL PINAR.IHI
1124576 01/02/2012 22:22:24 27.6713 -18.0179 10.1 1.0 mbLg SW EL PINAR.IHI
1124579 02/02/2012 00:36:57 27.7451 -18.0635 12.2 1.1 mbLg W FRONTERA.IHI
1124583 02/02/2012 04:40:59 27.7527 -18.0696 13.1 0.9 mbLg W FRONTERA.IHI 12120

1124584 02/02/2012 04:41:44 27.7683 -18.0854 14.8 1.1 mbLg W FRONTERA.IHI

quote:

NOTE AVCAN 438 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - FEBRUARY 03 2012-10:45 h peninsular - seismic-volcanic activity continues to moderate-high with simian located today in the marine area del Golfo and a deep to the east by the coast and on land in the mountain area to the Sea of las Calmas in the Julan, and some non-localized microseismicity. Continued volcanic tremor signal in the eruption of the Restinga, which continues to increase slightly its activity, and since that restart at 07:00 am on day 01, has not stopped, as he had done the previous days, the explosion seems to has increased somewhat, they are some explosions hydromagmatic. Magnitude between 2.7 and 1.1. New quakes 6. Felt earthquakes 1. Depths to 12.6, 13.1, 15.0, 16.6, 16.6 and 22.8km. Before yesterday 5. Yesterday 2. Now go 6. A total of 12,127 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 03 FEB EARTHQUAKES. - Dark Blue (6)
DAY 02 FEB EARTHQUAKES. - Yellow (3)
DAY 01 FEB EARTHQUAKES. - Light Green (5)
DAY 31 JAN EARTHQUAKES. - Red (14)
DAY 30 JAN EARTHQUAKES. - Light Blue (13)
DAY 29 JAN EARTHQUAKES. - Rosa (16)

Earthquakes today, three are still in the area of the three yesterday in the Golfo area, aligned NW-SE, from the coast toward the front of the Tanganasoga NW. Another earthquake near the coast at la frontera and has been at great depth, indicating a 22.8 km magma input into the system .. the truth is that almost all the deep are the area lately ... and two in the Julan from the mountain area to the coast, highlighting a 2.7 that has been felt.

The seismicity of recent days is a spiral, with three clearly aligned NNE-SSW, NS and NNW-SSE from all the Tanganosoga and two arms, one to the north towards the W in the area where the swarm began and another in the south to the eruptive area. It also highlights other alignments in the direction WNW-ESE in the line of summits and on the coast of Julan.

1124723 03/02/2012 00:17:41 27.7699 -18.0793 16.6 1.3 mbLg W FRONTERA.IHI
1124730 03/02/2012 00:45:23 27.7668 -18.0879 16.6 1.1 mbLg W FRONTERA.IHI
1124731 03/02/2012 00:54:53 27.7884 -18.1037 15.0 1.1 mbLg NW FRONTERA.IHI
1124733 03/02/2012 01:03:25 27.7154 -18.0605 13.1 1.7 mbLg SW FRONTERA.IHI

1124732 03/02/2012 01:14:00 27.7002 -18.0593 12.6 -1* 2.7 mbLg W EL PINAR.IHI
1124734 03/02/2012 01:59:37 27.7538 -18.0324 22.8 1.4 mbLg W FRONTERA.IHI
^{* (NOTE => In times, 2.7 this is felt based on feedback from FB AVCAN in the IGN as the meaning is not set)}

quote:

NOTE AVCAN 439 - QUAKE-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 04 2012-11:00 pm peninsular - seismic-volcanic activity remains moderate to high, with a remarkable simicidad 3.4 as in the South, specifically in the area near Punta del Lajial the coast. Much is still observed microseismicity in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, which is down slightly but the amplitude of the signal, has increased its explosiveness, with muchass hydromagmatic explosions, especially at dawn (see link). Magnitude between 2.7 and 1.1. New earthquakes 11. Felt earthquakes 1. Depths to 11.9 and 14.5km (and two to 8.1 and 9.6 and two at 15.9 and 16.4). Yesterday 3. Yesterday 11. Today van 6. A total of 12,138 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Henry).


DAY 04 FEB EARTHQUAKES. - Red (6)
DAY 03 FEB EARTHQUAKES. - Dark Blue (11)
DAY 02 FEB EARTHQUAKES. - Yellow (3)
DAY 01 FEB EARTHQUAKES. - Light Green (5)

In Today's earthquakes, very close to 3.4 along the coast in the Punta del Lajial has been two very close to the sea of Calm and a more inward in the Mar. The other two are in the area of peaks and the Julan by the other side of tanganasoga giving a NS alignment. It is also seen other very well that we had not seen so far down the slopes of Julan and continuity in the Gulf NW-SE and if extrapolated, would pass by the Restinga (Enrique)

1124781 03/02/2012 09:10:01 27.7031 -18.0386 11.9 1.1 mbLg W EL PINAR.IHI
1124782 03/02/2012 09:14:51 27.7471 -18.0399 8.1 0.8 mbLg W FRONTERA.IHI
1124842 03/02/2012 14:13:13 27.7261 -18.0123 9.6 1.2 mbLg SW FRONTERA.IHI 12130

1124837 03/02/2012 14:35:52 27.6913 -18.0306 12.9 2.4 mbLg SW EL PINAR.IHI
1124852 03/02/2012 14:42:35 27.6956 -18.0332 14.1 1.7 mbLg W EL PINAR.IHI

1124858 04/02/2012 02:41:53 27.7156 -18.0581 14.5 1.7 mbLg SW FRONTERA.IHI
1124859 04/02/2012 03:04:33 27.6428 -18.0935 15.9 1.6 mbLg SW EL PINAR.IHI
1124870 04/02/2012 04:40:28 27.6508 -18.0230 16.4 -1 3.4 mbLg SW EL PINAR.IHI

1124878 04/02/2012 04:43:00 27.6547 -18.0328 14.5 1.6 mbLg SW EL PINAR.IHI
1124888 04/02/2012 05:43:38 27.6969 -18.0621 12.9 1.3 mbLg W EL PINAR.IHI
1124889 04/02/2012 06:35:17 27.6567 -18.0428 13.6 1.5 mbLg SW EL PINAR.IHI

quote:

Earthquake report
- Geolurling (nickname) is a specialist plotter and has created 3- and 4-D animations of earthquakes and GPS data since many months. The first part of the video goes into the discussion of using GPS data from a research project from the Involcan and a Japanese professor. We are showing this video because it gives a very good impression of where the earthquakes are taking place (second part). The plotted earthquakes have taken place in between Jan. 1 and Febr. 2.

Hierro Quakes 3Feb.swf

quote:

NOTE AVCAN 440 - QUAKE-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 05 2012-11:30 pm peninsular - seismic-volcanic activity remains moderate, with seismicity located beneath the summit area. Microseismicity is also detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of La Restinga, which although slightly increasing the amplitude of its signal, yesterday was rising, with up to midnight or so and then came down, but now is rising again and continued explosiveness, but less than yesterday, with some explosions hydromagmatic. Magnitude between 2.1 and 1.3. New earthquakes 2. Depths at 10.4 and 11.8 km. 11 yesterday. Yesterday 7. Today is 1. A total of 12,140 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Henry).

DAY 05 FEB EARTHQUAKES. - Rosa (1)
DAY 04 FEB EARTHQUAKES. - Red (7)
DAY 03 FEB EARTHQUAKES. - Dark Blue (11)
DAY 02 FEB EARTHQUAKES. - Yellow (3)
DAY 01 FEB EARTHQUAKES. - Light Green (5)

The map of seismic activity in the last 5 days, the quake today was under her skirt in the Northwest Tanganasoga Valley del Golf and 2.1 of yesterday was in the area of peaks. Yesterday addition of 3.2 near the coast in the Punta del Lajial has had two very close to the sea de las Calmas and a more inward in the Sea The other two were in the area of peaks and Julan by other side of tanganasoga giving a NS alignment. It is also seen other very well that we had not seen so far down the slopes of Julan and continuity in the Gulf NW-SE and if extrapolated, would pass by the Restinga (Enrique).

1124905 04/02/2012 16:48:01 27.7106 -18.0391 11.8 2.1 mbLg W EL PINAR.IHI
1124980 05/02/2012 07:37:13 27.7339 -18.0701 10.4 1.3 mbLg SW FRONTERA.IHI 12140

quote:

NOTE AVCAN 441 - QUAKE-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 06 2012-12:00 pm peninsular - seismic-volcanic activity remains moderate, with seismicity located beneath the area Tanganasoga and summits. There is also a sismito in her sea of ​​calm. Microseismicity is also detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, which although it has declined to almost nothing, but still there. Note that at midnight last night and early early this morning had a few hours in which much increased amplitude and explosiveness, with many explosions hydromagmatic, then dsiminuir rapidly but not suddenly, but more or less gradual. Magnitude between 1.8 and 0.9. New earthquakes 5. Depths at 9.6, 11.8, 12.8, 13.0 and 13.6km. Yesterday 7. Yesterday 3. Today van 3. A total of 12,145 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Henry).

DAY 06 FEB EARTHQUAKES. - Light Blue (3)
DAY 05 FEB EARTHQUAKES. - Rosa (3)
DAY 04 FEB EARTHQUAKES. - Red (7)
DAY 03 FEB EARTHQUAKES. - Dark Blue (11)
DAY 02 FEB EARTHQUAKES. - Yellow (3)
DAY 01 FEB EARTHQUAKES. - Light Green (5)

The map of seismic activity in the last 6 days of the three earthquakes today (light blue), two have been under the Tanganasoga next to the valley of the Gulf and another 1.3 in the Sea of ​​Calmas.Ayer (Rosa ) afternoon a couple more in the area of summits in the alignment from the NS to the Julan Tangansoga. Addition of 3.2 before yesterday very close to shore in the Punta del Lajial has had two very close to the sea of Calm and a more inward in the Sea The other two were in the area of peaks and Julan by other side of tanganasoga giving a NS alignment. It is also seen other very well that we had not seen so far down the slopes of Julan and continuity in the Gulf NW-SE and if extrapolated, would pass by the Restinga (Enrique).

1124984 05/02/2012 12:05:05 27.7000 -18.0503 12.8 1.8 mbLg W EL PINAR.IHI
1125010 05/02/2012 16:07:08 27.7276 -18.0579 11.8 1.7 mbLg SW FRONTERA.IHI

1125078 06/02/2012 06:02:50 27.7208 -18.0349 9.6 0.9 mbLg SW FRONTERA.IHI
1125082 06/02/2012 06:59:18 27.6444 -18.0628 13.6 1.3 mbLg SW EL PINAR.IHI
1125084 06/02/2012 07:50:41 27.7330 -18.0691 13.0 1.3 mbLg SW FRONTERA.IHI

quote:

Update 06/02 18:02 UTC
- The activity at the eruption site has been quite with almost a constant faint jacuzzi. We havent seen SLS. Should earthquakes continue, we would expect a rise in the activity.
- INVOLCAN has just published an incredible set of todays photographs taken from the Guardia Civil helicopter flight, showing, as we commented today, a vivid blue stain, formed by gas release, with CO2 bubbles, and a bigger green stain, formed by nitrogen and sulfur gases, that lays inside La Restinga port.

quote:

In this exclusive graphical performed on an image from Google Earth, you can see in detail only the coordinates of the active face today, as in the photos of flight presents scientific phenomena of intense degassing. The coordinates of the other mouths effectively correspond to other places where materials or gases have come from the principle of submarine fissural eruption of La Restinga.
[bron]

quote:

NOTE AVCAN 442 - QUAKE-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 07 2012-12:00 pm peninsular - seismic-volcanic activity remains moderate to high, with activity in the area of peaks in the area of ​​Tanganasoga, the Julan and the sea of las Calmas. also looks pretty microseismicity detected after midnight but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, which although it has declined to almost nothing, about 03:00 am in the morning today and amplitude increase much in the explosion, with many explosions hydromagmatic. Magnitude between 2.6 and 0.7. New earthquakes 9. Felt earthquakes 2. Depths between 10.9 and 14.7km (and each other at 6.3 and 16.6). Yesterday 3. Yesterday 11. Today is 1. A total of 12,154 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Henry).

DAY 07 FEB EARTHQUAKES. - Orange (1)
DAY 06 FEB EARTHQUAKES. - Light Blue (11)
DAY 05 FEB EARTHQUAKES. - Rosa (3)
DAY 04 FEB EARTHQUAKES. - Red (7)
DAY 03 FEB EARTHQUAKES. - Dark Blue (11)
DAY 02 FEB EARTHQUAKES. - Yellow (3)
DAY 01 FEB EARTHQUAKES. - Light Green (5)

The map of seismic activity in the last week, the only today is on the coast of Julan and yesterday (light blue), two have since Tanganasoga in the valley of the Golfo to the Sea of las Calmas Crossing the Julan. before yesterday (Rosa) afternoon a couple more in the area of summits in the alignment from the NS to the Julan Tangansoga. Addition of 3.2 before yesterday very close to shore in the Punta del Lajial has had two very close to the sea of las Calmas and a more inward in the Sea The other two were in the area of peaks and Julan by tanganasoga other side of giving a NS alignment. It is also seen other very well that we had not seen so far down the slopes of Julan and continuity in the Gulf NW-SE and if extrapolated, would pass by the Restinga (Enrique).

11125116 06/02/2012 12:09:28 27.6839 -18.1093 16.6 1.9 mbLg W EL PINAR.IHI
1125142 06/02/2012 13:26:56 27.6517 -18.1058 6.3 1.1 mbLg SW EL PINAR.IHI

1125144 06/02/2012 14:11:59 27.7164 -18.0472 11.2 0.7 mbLg SW FRONTERA.IHI
1125147 06/02/2012 15:00:21 27.7127 -18.0781 14.2 1.0 mbLg SW FRONTERA.IHI
1125148 06/02/2012 15:26:09 27.7115 -18.0604 12.1 1.8 mbLg SW FRONTERA.IHI 12150

1125145 06/02/2012 15:45:06 27.6997 -18.0613 11.9 -1 2.6 mbLg W EL PINAR.IHI
1125149 06/02/2012 18:04:03 27.6928 -18.0470 10.9 -1* 1.7 mbLg W EL PINAR.IHI
1125151 06/02/2012 21:43:25 27.6948 -18.0761 14.7 1.7 mbLg W EL PINAR.IHI

1125159 07/02/2012 02:21:25 27.6805 -18.0516 10.8 1.0 mbLg SW EL PINAR.IHI

quote:

NOTE AVCAN 443 - QUAKE-VOLCANIC ACTIVITY - ISLA DEL HIERRO - 08 FEBRUARY 2012-12:00 h peninsular - seismic-volcanic activity remains moderate, with activity in the area of peaks in the area of ​​Tanganasoga, the Julan and the sea of las Calmas. also looks pretty microseismicity detected after midnight but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, which although it has declined to almost nothing, yesterday had several esplosiones quite importanes hydromagmatic at noon. New earthquakes 14. Felt earthquakes 2. Magnitude between 2.3 and 0.8. Depths between 10 and 15km (and one to 20.5). 11 yesterday. Yesterday 10. 5 are today. A total of 12,168 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Henry).

DAY 08 FEB EARTHQUAKES. - Red (5)
DAY 07 FEB EARTHQUAKES. - Orange (10)
DAY 06 FEB EARTHQUAKES. - Light Blue (11)

The map of seismic activity in the last days, concentrated in the area of peaks in the area of ​​Tanganasoga, the Julan and the sea de las Calmas. Noteworthy that deep earthquake in the area of Cala Tacorón which may indicate contribution of new magma from deep in the system. (Enrique)

1125215 07/02/2012 10:29:21 27.6729 -18.0385 15.0 1.4 mbLg SW EL PINAR.IHI

1125210 07/02/2012 10:55:14 27.7206 -18.0516 14.4 1.3 mbLg SW FRONTERA.IHI
1125204 07/02/2012 11:37:49 27.6866 -18.0422 13.3 2.3 mbLg SW EL PINAR.IHI
1125242 07/02/2012 13:31:08 27.6755 -18.0538 11.5 1.4 mbLg SW EL PINAR.IHI
1125243 07/02/2012 13:58:44 27.7252 -18.0626 10.5 1.6 mbLg SW FRONTERA.IHI
1125244 07/02/2012 20:20:55 27.6694 -18.0497 13.3 1.0 mbLg SW EL PINAR.IHI 12160

1125245 07/02/2012 22:25:26 27.5455 -18.0210 10.0 1.2 mbLg S EL PINAR.IHI
1125246 07/02/2012 22:57:26 27.7369 -18.0282 10.9 1.8 mbLg SW FRONTERA.IHI
1125247 07/02/2012 23:30:07 27.7150 -18.0476 12.1 1.7 mbLg SW FRONTERA.IHI

1125249 08/02/2012 00:42:03 27.7006 -18.0632 14.0 1.3 mbLg W EL PINAR.IHI
1125250 08/02/2012 00:43:14 27.7146 -18.0765 11.8 1.3 mbLg SW FRONTERA.IHI

1125253 08/02/2012 02:52:19 27.6974 -18.0397 11.3 1.4 mbLg W EL PINAR.IHI
1125263 08/02/2012 06:12:40 27.6624 -18.0462 14.3 0.8 mbLg SW EL PINAR.IHI
1125264 08/02/2012 07:33:12 27.6461 -18.0396 20.5 1.4 mbLg SW EL PINAR.IHI

quote:

NOTE AVCAN 445 - QUAKE-VOLCANIC ACTIVITY - ISLE OF IRON - 10 FEBRUARY 2012-11:30 h peninsular - seismic-volcanic activity remains moderate, with activity in the Julan and the Sea de las Calmas. Also looks pretty microseismicity detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, and since reappeared after 04:00 am UTC yesterday continues to increase steadily, in fact since the last part of the amplitude is more than double. New earthquakes 3. Magnitude between 1.7 and 1.1. Depths between 11.3 and 12.5km. Yesterday 9. Yesterday 5. Today will 2. A total of 12,179 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Henry).

DAY 10 FEB EARTHQUAKES. - Light green (2)
DAY 09 FEB EARTHQUAKES. - Yellow (5)
DAY 08 FEB EARTHQUAKES. - Red (9)
DAY 07 FEB EARTHQUAKES. - Orange (10)
DAY 06 FEB EARTHQUAKES. - Light Blue (11)

1125607 09/02/2012 19:03:15 27.6780 -18.0526 12.5 1.7 4 SW EL PINAR.IHI
1125671 10/02/2012 01:56:08 27.6637 -18.0784 11.8 1.5 4 SW EL PINAR.IHI
1125674 10/02/2012 04:55:29 27.6874 -18.0619 11.3 1.1 4 W EL PINAR.IHI

quote:

NOTE AVCAN 446 - QUAKE-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 11 2012-11:30 pm peninsular - seismic-volcanic activity remains moderate, with activity in the Julan and the Sea de las Calmas yesterday aligned NNE-SSW to Frontera and also today the NE-SW to the slope of El Golfo. Also looks pretty microseismicity detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, and since reappeared after 04:00 am UTC ... the day before yesterday continues although it has already peaked and is beginning to decline. It has also presented more instability with some explosions hydromagmatic. New earthquakes 9. Magnitude between 1.8 and 0.9. Depths between 8.1 and 12.4km. Yesterday 5. Yesterday 8. 3 are today. A total of 12,188 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 11 FEB EARTHQUAKES. - Rosa (3)
DAY 10 FEB EARTHQUAKES. - Light green (8)
DAY 09 FEB EARTHQUAKES. - Yellow (5)
DAY 08 FEB EARTHQUAKES. - Red (9)
DAY 07 FEB EARTHQUAKES. - Orange (10)
DAY 06 FEB EARTHQUAKES. - Light Blue (11)

1125789 10/02/2012 10:57:28 27.6979 -18.0641 8.7 1.8 mbLg W EL PINAR.IHI 12180

1125961 10/02/2012 20:30:52 27.6820 -18.0715 12.4 1.2 mbLg SW EL PINAR.IHI
1125963 10/02/2012 21:15:42 27.7802 -18.0085 9.5 1.0 mbLg NW FRONTERA.IHI
1125964 10/02/2012 21:43:12 27.7241 -18.0459 10.1 1.8 mbLg SW FRONTERA.IHI
1125967 10/02/2012 22:49:32 27.6570 -18.0441 8.1 1.0 mbLg SW EL PINAR.IHI
1125974 10/02/2012 23:51:10 27.6453 -18.0732 9.0 2.1 mbLg SW EL PINAR.IHI

1126000 11/02/2012 02:06:36 27.7353 -18.0065 0.9 mbLg SW FRONTERA.IHI
1126004 11/02/2012 05:23:12 27.6601 -18.0677 10.2 1.2 mbLg SW EL PINAR.IHI
1126010 11/02/2012 05:31:13 27.6720 -18.0541 11.6 1.2 mbLg SW EL PINAR.IHI

quote:

NOTE AVCAN 447 - QUAKE-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 12 2012-12:00 pm peninsular - seismic-volcanic activity remains moderate, with activity in the el Golfo bay and the Sea de las Calmas yesterday aligned NS. Also looks pretty microseismicity detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, low enough but since yesterday after 04:00 h UTC this morning is picking up again. New quakes 8. Magnitude between 1.8 and 0.7. Depths between 8.0 and 12.7km (2.7km and one and one at 16.1km). Yesterday 8. Yesterday 5. 6 are today. A total of 12,196 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 12 FEB EARTHQUAKES. - Dark Blue (6)
DAY 11 FEB EARTHQUAKES. - Rosa (5)
DAY 10 FEB EARTHQUAKES. - Light green (8)
DAY 09 FEB EARTHQUAKES. - Yellow (5)
DAY 08 FEB EARTHQUAKES. - Red (9)
DAY 07 FEB EARTHQUAKES. - Orange (10)
DAY 06 FEB EARTHQUAKES. - Light Blue (11)

The recent earthquakes are in the el Golfo bay and Sea de las Calmas, as well as any in the area of cumbres. Note that one of yesterday and today 4 are aligned in NS direction from the Cala Tacorón - Julan and progress towards N, ie first the slope next to the del Golfo and then to the coast ... The following would be by the sea .. see .. Note that this configuration during the months of July and August preceding activity within a few days you also see. Then there is a deeper earthquake west of Tanganasoga and the slope of del Golfo area to the east, the area of the San Andreas fault.

1126022 11/02/2012 10:10:17 27.6919 -18.0251 12.7 1.8 mbLg SW EL PINAR.IHI
1126132 11/02/2012 23:58:12 27.7226 -18.0768 16.1 1.0 mbLg SW FRONTERA.IHI 12190

1126133 12/02/2012 00:16:54 27.7275 -18.0277 10.6 1.5 mbLg SW FRONTERA.IHI
1126134 12/02/2012 00:18:19 27.7346 -18.0270 9.5 1.3 mbLg SW FRONTERA.IHI
1126136 12/02/2012 01:01:01 27.7450 -18.0291 8.0 1.1 mbLg SW FRONTERA.IHI
1126137 12/02/2012 02:48:18 27.7464 -17.9894 9.8 0.7 mbLg SE FRONTERA.IH
1126139 12/02/2012 03:12:48 27.6478 -18.0452 1.4 mbLg SW EL PINAR.IHI

1126145 12/02/2012 07:35:31 27.7594 -18.0297 2.7 0.8 mbLg W FRONTERA.IHI

La Restinga 20120207 13:34 UTC - eruption stain, degassing

quote:

Sismograma de un Día en MACI (Tenerife)
Curious MACI seismogram for the day Sunday 12 which shows how they react differently, the three axes of the sensor. The bottom, the vertical axis shows a long run-wave signal and therefore of very low frequency. Could be interpreted as "earth tides? ... (JR)


NOTE AVCAN 448 - QUAKE-VOLCANIC ACTIVITY - IRON ISLAND - FEBRUARY 13 2012-10:30 pm peninsular - seismic-volcanic activity remains moderate, with activity Sea de las Calmas and a deep earthquake zone yesterday at the tip of Arenas white. Also looks pretty microseismicity detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, yesterday rose again and remains today, albeit with a slight tendency to decrease. New quakes 6. Magnitude between 2.0 and 1.1. Depths between 10.1 and 11.6km (and one at 8.8 and one at 23.2km). Yesterday 5. Yesterday 10. Today will 2. A total of 12,196 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 13 FEB EARTHQUAKES. - Light green (2)
DAY 12 FEB EARTHQUAKES. - Dark Blue (10)
DAY 11 FEB EARTHQUAKES. - Rosa (5)

The recent earthquakes are in the sea of las calmas, except for a deep earthquake zone yesterday at the tip of Arenas Blancas Sabinosa at 23.2km and the seismicity yesterday also located on the night and morning in the el Golfo area and afternoon in the sea de las Calmas. Del Golfo activity lined up mainly in NS. (Enrique).

1126147 12/02/2012 11:28:27 27.6785 -18.0666 10.5 2.0 mbLg SW EL PINAR.IHI
1126148 12/02/2012 21:53:57 27.7579 -18.1182 23.2 1.4 mbLg W FRONTERA.IHI
1126149 12/02/2012 22:06:49 27.6974 -18.0587 8.8 1.6 mbLg W EL PINAR.IHI
1126150 12/02/2012 22:22:33 27.6887 -18.0687 11.6 1.1 mbLg W EL PINAR.IHI 12200

1126162 13/02/2012 06:10:09 27.6652 -18.0479 10.1 1.1 mbLg SW EL PINAR.IHI
1126165 13/02/2012 07:41:03 27.6571 -18.0787 10.2 1.7 mbLg SW EL PINAR.IHI

quote:

NOTE AVCAN 449 - QUAKE-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 14 2012-12:00 pm peninsular - seismic-volcanic activity remains moderate activity today with the sea de las Calmas, the Julan, and the peaks to Orchilla continued yesterday. Also looks pretty microseismicity detected but not located in the spectrogram. Continued volcanic tremor signal in the area Eruptive ... La Restinga, fell again yesterday afternoon in intensity to rise during the night and early morning and has fallen again. By the way yesterday afternoon felt hum and noise in parts of the island in the area of ​​the Mocanes and Timijiraque that coincided with one of the earthquakes (20:10). New earthquakes 12. Magnitude between 1.8 and 0.6. Depths between 9.9 and 16.1km (and one at 6.3 and one at 17.4km). Yesterday 10. Yesterday 10. 4 are today. A total of 12,214 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Henry).

DAY 13 FEB EARTHQUAKES. - Yellow (4)
DAY 13 FEB EARTHQUAKES. - Light green (10)
DAY 12 FEB EARTHQUAKES. - Dark Blue (10)
DAY 11 FEB EARTHQUAKES. - Rosa (5)
The map of seismic activity in the last 4 days, one can see how 3 of today's earthquakes are aligned in an alignment rarely seen so far, NW-SE, which coincides with that observed in the area eruption of the Restinga, in fact if it continues this alignment is reached that area. Like earthquakes today, yesterday afternoon activity was concentrated in the Sea of las Calmas and Julan mainly, but there was one morning in the el Golfo area. Highlight a deep earthquake before yesterday in the area of ​​the tip of Arenas Blancas Sabinosa at 23.2km and the seismicity before yesterday was also found on the night and morning in the el Golfo and in the afternoon at Sea de las Calmas. Del Golfo activity lined up mainly in NS. (Enrique).
1126170 13/02/2012 08:27:55 27.7003 -18.0498 10.7 1.8 mbLg W EL PINAR.IHI
1126173 13/02/2012 08:51:12 27.7395 -18.0494 6.3 0.8 mbLg SW FRONTERA.IHI
1126191 13/02/2012 10:16:46 27.7116 -18.0603 16.1 0.9 mbLg SW FRONTERA.IHI

1126252 13/02/2012 12:52:44 27.6832 -18.0803 10.5 0.6 mbLg W EL PINAR.IHI
1126272 13/02/2012 17:42:53 27.6596 -18.0701 10.9 1.5 mbLg SW EL PINAR.IHI
1126273 13/02/2012 18:03:45 27.6636 -18.0710 9.9 1.3 mbLg SW EL PINAR.IHI
1126297 13/02/2012 20:10:39 27.7136 -18.0661 10.3 1.5 mbLg SW FRONTERA.IHI
1126314 13/02/2012 21:06:27 27.6947 -18.0731 11.9 1.5 mbLg W EL PINAR.IHI 12210

1126344 14/02/2012 00:42:01 27.7269 -18.1018 17.4 1.1 mbLg SW FRONTERA.IHI
1126345 14/02/2012 01:15:10 27.7023 -18.0799 11.6 1.6 mbLg W EL PINAR.IHI
1126393 14/02/2012 07:22:43 27.6503 -18.0661 15.7 1.1 mbLg SW EL PINAR.IHI
1126450 14/02/2012 08:23:23 27.6709 -18.0551 14.1 1.6 mbLg SW EL PINAR.IHI

quote:

And this is the evolution of the released seismic energy accumulated in so far in 2012, where it looks like this up after the 3.2 the other day and indicating that the system is responsive and seeing as there are different steps .. . and doing a little analysis leads me to a question Will the pattern of reactivation of a step more or less noticeable each "10-14" days?.

If it does, we should expect an earthquake a little higher, around 3.0 degrees or something else from today to the next 3-4 days.

If, however, does not follow the pattern, we will stay where it has been a surge and the graph would follow its slope, which indicates that it continues releasing energy to be active. (Enrique)

[bron]

quote:

Update 14/02 – 16:45 UTC
- There has been an official communication [In Spanish] from the Government of Canary Islands that clarifies previous reports including an image from the bathymetry.
- “Eruption is still active, with a process of magmatic reactivation, constant vigilance will remain.
Scientists responsible of IOE, from Ramón Margalef, have confirmed to PEVOLCA that the depth of the main cone is 120 meters.
Also, from the bathymetry works done last week, scientists have recorded the emergence of a secondary cone attached to the side of the maincone having a height of 75 meters and whose summit is 200 meters from the surface.”

- “It is also apparent that the emission of material varies around the main summit. The area, East of El Julan, is the only place in which submarine volcanic activity has been detected in all surveyed areas, in the various campaigns.”

quote:

NOTE AVCAN 450 - SEISMIC-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 15 2012-8:00 pm peninsular - seismic-volcanic activity remains moderate activity today with the sea de las Calmas, Coast Julan and in the area of peaks at like yesterday with some more in the area of peaks and Frontera. Also looks pretty microseismicity detected but not located in the spectrogram. Continued volcanic tremor signal in the Eruptive area ... La Restinga, fell again yesterday afternoon in intensity to rise during the night and early yesterday morning and has since been declining, more and even seems to want to pick up something the last few hours. New earthquakes 10. Magnitude between 2.3 and 1.2. Depths between 8.8 and 11.9km (and two at 6.2 and 7.1km). Yesterday 10. Yesterday 10. 6 are today. A total of 12,226 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 15 FEB EARTHQUAKES. - Red (6)
DAY 14 FEB EARTHQUAKES. - Yellow (10)
DAY 13 FEB EARTHQUAKES. - Light green (10)
DAY 12 FEB EARTHQUAKES. - Dark Blue (10)
DAY 11 FEB EARTHQUAKES. - Rosa (5)

The seismicity map of útlimos 5 days, Los today are in the Mar de las Calmas, three along the coast of Julan and two further south. Highlight one of 2.3 in the area of peaks. Yesterday was the seismicity Nearby, including some more towards the area of peaks and Frontera. Like earthquakes now and aye, before yesterday afternoon's activity was concentrated in the Mar de las Calmas and Julan mainly, but there was one morning in the el Golfo area. Highlight a deep earthquake on 12 in the area of the tip of Arenas Blancas Sabinosa at 23.2km and the seismicity is located on the night and morning in the Golfo and in the afternoon at Sea de las Calmas. Del Golfo activity lined up mainly in NS. (Enrique).

1126539 14/02/2012 12:51:26 27.6678 -18.0561 11.3 1.9 mbLg SW EL PINAR.IHI

1126549 14/02/2012 13:01:12 27.7067 -18.0605 6.2 2.2 mbLg W EL PINAR.IHI
1126563 14/02/2012 18:23:39 27.6553 -18.0865 8.8 1.6 mbLg SW EL PINAR.IHI
1126566 14/02/2012 20:06:09 27.6232 -18.0741 9.9 1.3 mbLg SW EL PINAR.IHI
1126568 14/02/2012 22:11:31 27.7507 -18.0448 9.9 1.2 mbLg W FRONTERA.IHI
1126589 14/02/2012 23:45:11 27.6530 -18.0504 9.9 1.2 mbLg SW EL PINAR.IHI 12220

1126591 15/02/2012 01:50:54 27.6892 -18.0726 7.1 1.4 mbLg W EL PINAR.IHI
1126593 15/02/2012 02:26:24 27.6451 -18.0904 10.8 1.4 mbLg SW EL PINAR.IHI
1126605 15/02/2012 04:05:33 27.6548 -18.0571 2.0 mbLg SW EL PINAR.IHI
1126607 15/02/2012 04:15:10 27.6921 -18.0833 10.5 1.3 mbLg W EL PINAR.IHI
1126637 15/02/2012 05:02:09 27.6835 -18.0851 11.9 1.3 mbLg W EL PINAR.IHI

1126639 15/02/2012 05:21:51 27.7122 -18.0573 9.6 2.3 mbLg SW FRONTERA.IHI

quote:

Important Update 15/02 – 15:23 UTC
- 2 great new Ramon Margalef documents (including the bathymetry data) which were the basis of the Pevolca press conference from yesterday (thank you ER reader Julian). Both are in Spanish and are very technical, but some easy conclusions can be distilled from it.
Informe de campaña BIMBACHE1011-9 / 2012
Informe 9‐12 de febrero de 2012. Bimbache1011 leg 10

quote:

NOTE AVCAN 451 - SEISMIC-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 16 2012-11:00 pm peninsular - seismic-volcanic activity remains moderate activity today with the sea de las Calmas, Coast Julan and one very close to the eruptive , a little to the NW of it. Microseismicity is also detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, takes 4 days non-stop down and it is hardly noticeable in the spectrogram, while watching the activity on the webcam and the seismogram seems to want to pick up some last hour. New earthquakes 25. Magnitude between 2.0 and 0.7. Depths between 9.4 and 12.9km (and three at 6.7, 8.1 and 8.9km and four to 15.4, 16.7, 17.3 and 19.9km). Yesterday 10. Yesterday 23. 8 are today. A total of 12,251 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

FEB. - Light Blue (8)
DAY 15 FEB EARTHQUAKES. - Red (23)
DAY 14 FEB EARTHQUAKES. - Yellow (10)
DAY 13 FEB EARTHQUAKES. - Light green (10)
DAY 12 FEB EARTHQUAKES. - Dark Blue (10)
DAY 11 FEB EARTHQUAKES. - Rosa (5)

The seismicity map of útlimos 6 days, today, as yesterday, are the Mar de las Calmas and one near the eruption of La Restinga. Those of yesterday were in the Mar de las Calmas in the Julan in the area of peaks and in the Golfo area. Yesterday was the seismicity Nearby, including some more towards the area of peaks and Frontera. Highlight the 19.9km earthquake ... in an area where there has been little seismicity and the red is more to the SW. Like earthquakes and the day before yesterday. The diameter 13 in the afternoon activity was concentrated in the Mar de las Calmas and Julan mainly, but there was one morning in the Golfo area. Highlight a deep earthquake on 12 in the area of the tip of Arenas Blancas Sabinosa at 23.2km and the seismicity is located on the night and morning in the Golfo and in the afternoon at Sea de las Calmas. Del Golfo activity lined up mainly in NS. (Enrique).

1126641 15/02/2012 05:45:47 27.6708 -18.1191 10.6 1.5 mbLg W EL PINAR.IHI
1126651 15/02/2012 06:28:28 27.7081 -18.0531 12.3 0.8 mbLg W EL PINAR.IHI
1126653 15/02/2012 06:30:49 27.6994 -18.0814 10.1 0.9 mbLg W EL PINAR.IHI
1126662 15/02/2012 08:50:09 27.6627 -18.0746 10.3 1.1 mbLg SW EL PINAR.IHI 12230

1126682 15/02/2012 09:35:11 27.6208 -18.0882 10.5 1.4 mbLg SW EL PINAR.IHI
1126688 15/02/2012 09:35:33 27.6955 -18.0587 10.0 0.9 mbLg W EL PINAR.IHI
1126746 15/02/2012 11:03:09 27.6401 -18.0523 16.7 1.5 mbLg SW EL PINAR.IHI
1126809 15/02/2012 13:59:11 27.7101 -18.0090 17.3 0.9 mbLg W EL PINAR.IHI
1126818 15/02/2012 14:15:59 27.7389 -18.0289 8.1 0.8 mbLg SW FRONTERA.IHI

1126823 15/02/2012 14:31:39 27.7027 -18.0452 12.5 0.7 mbLg W EL PINAR.IHI
1126831 15/02/2012 16:05:34 27.7288 -18.0295 10.2 1.5 mbLg SW FRONTERA.IHI
1126832 15/02/2012 16:11:54 27.7461 -18.0346 10.1 0.7 mbLg SW FRONTERA.IHI
1126839 15/02/2012 16:12:39 27.6934 -18.0970 15.4 1.0 mbLg W EL PINAR.IHI
1126843 15/02/2012 17:10:54 27.6178 -18.1423 19.9 2.0 mbLg SW EL PINAR.IHI 12240

1126844 15/02/2012 17:23:08 27.6906 -18.0383 10.7 1.1 mbLg SW EL PINAR.IHI
1126848 15/02/2012 17:34:26 27.7132 -18.0328 11.4 1.4 mbLg W EL PINAR.IHI
1126849 15/02/2012 17:56:56 27.7396 -18.0791 11.5 1.0 mbLg W FRONTERA.IHI

1126861 16/02/2012 01:21:40 27.6734 -18.0648 10.3 1.7 mbLg SW EL PINAR.IHI
1126863 16/02/2012 02:58:52 27.6807 -18.0930 9.4 1.4 mbLg W EL PINAR.IHI

1126870 16/02/2012 03:36:29 27.7013 -18.0878 11.3 1.3 mbLg SW FRONTERA.IHI
1126872 16/02/2012 03:50:24 27.6764 -18.0633 11.7 1.4 mbLg SW EL PINAR.IHI
1126874 16/02/2012 03:57:00 27.6022 -18.0730 10.0 1.1 mbLg SW EL PINAR.IHI
1126884 16/02/2012 06:10:05 27.6814 -18.0752 6.7 1.8 mbLg SW EL PINAR.IHI
1126885 16/02/2012 06:29:56 27.6205 -18.0043 12.9 0.5 mbLg SW EL PINAR.IHI 12250

1126886 16/02/2012 07:07:48 27.6647 -18.0817 8.9 0.7 mbLg SW EL PINAR.IHI

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NOTE AVCAN 452 - SEISMIC-VOLCANIC ACTIVITY - HIERRO ISLAND - FEBRUARY 17 2012-9:15 pm peninsular - seismic-volcanic activity remains moderate, with seismic activity today in the area of mountain peaks, Tanganasoga height towards the Julan and east coast Julan. Microseismicity is also detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, takes 5 days down without stopping, but rebounded somewhat yesterday, following the low and barely noticeable in the spectrogram. New earthquakes 26. Magnitude between 1.5 and 0.2. Depths between 7.1 and 12.3km (and one 2.7km and four at 15.2, 15.6, 15.9 and 16.0km). Yesterday 23. Yesterday 30. 5 are today. A total of 12,277 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

FEB. - Yellow (5)
DAY 16 FEB EARTHQUAKES. - Light Blue (30)
DAY 15 FEB EARTHQUAKES. - Red (23)

The seismicity is concentrated today in the area of peaks and Julan, while that of yesterday is well distributed throughout the area of seismic activity from the el Golfo area to the Mar de las Calmas and even on land (Enrique).

1126900 16/02/2012 08:12:11 27.7026 -18.0861 10.8 0.7 mbLg SW FRONTERA.IHI
1126902 16/02/2012 08:20:37 27.7061 -18.0796 11.2 1.2 mbLg SW FRONTERA.IHI
1126903 16/02/2012 08:43:49 27.7046 -18.0705 12.3 1.4 mbLg W EL PINAR.IHI
1126927 16/02/2012 11:11:47 27.6652 -18.0432 7.1 1.1 mbLg SW EL PINAR.IHI

1126941 16/02/2012 11:11:58 27.6777 -18.0307 7.3 1.2 mbLg SW EL PINAR.IHI
1126970 16/02/2012 12:14:23 27.6904 -18.0633 11.0 0.5 mbLg W EL PINAR.IHI
1127001 16/02/2012 12:52:17 27.6538 -18.0578 6.8 1.2 mbLg SW EL PINAR.IHI
1127007 16/02/2012 13:01:01 27.7537 -18.0696 15.2 1.5 mbLg W FRONTERA.IHI
1127009 16/02/2012 13:02:57 27.8471 -18.0506 2.7 0.9 mbLg NW FRONTERA.IHI 12260

1127011 16/02/2012 13:05:24 27.7174 -18.0488 11.6 0.8 mbLg SW FRONTERA.IHI
1127013 16/02/2012 13:18:43 27.7404 -18.0605 15.6 0.7 mbLg W FRONTERA.IHI
1127015 16/02/2012 14:36:59 27.7180 -18.0163 12.4 0.6 mbLg W EL PINAR.IHI
1127016 16/02/2012 15:15:21 27.7556 -18.0487 15.9 0.2 mbLg W FRONTERA.IHI
1127018 16/02/2012 15:38:42 27.7094 -18.0393 16.0 0.7 mbLg W EL PINAR.IHI

1127019 16/02/2012 15:42:03 27.7536 -18.0366 10.6 0.9 mbLg W FRONTERA.IHI
1127020 16/02/2012 16:54:16 27.6525 -17.9966 0.8 mbLg SW EL PINAR.IHI
1127021 16/02/2012 17:07:38 27.7119 -18.0802 11.8 1.0 mbLg SW FRONTERA.IHI
1127049 16/02/2012 18:07:05 27.7194 -18.0480 11.4 0.3 mbLg SW FRONTERA.IHI
1127047 16/02/2012 18:53:36 27.7232 -18.0603 8.0 0.9 mbLg SW FRONTERA.IHI 12270

1127048 16/02/2012 19:11:41 27.6774 -18.0502 9.7 0.7 mbLg SW EL PINAR.IHI
1127060 16/02/2012 20:19:23 27.7379 -18.0583 12.3 1.0 mbLg SW FRONTERA.IHI

1127071 17/02/2012 00:26:43 27.7276 -18.0525 10.1 1.3 mbLg SW FRONTERA.IHI
1127073 17/02/2012 01:28:20 27.6930 -18.0499 11.2 1.4 mbLg W EL PINAR.IHI
1127074 17/02/2012 02:10:44 27.6920 -18.0614 12.0 1.2 mbLg W EL PINAR.IHI

1127077 17/02/2012 05:38:49 27.7096 -18.0672 10.7 1.5 mbLg SW FRONTERA.IHI
1127078 17/02/2012 05:41:08 27.7213 -18.0653 11.7 0.7 mbLg SW FRONTERA.IHI

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Javier's image of the moon's influence on the tremor can not be seen by the small font size. Americans are big supporters of the influence of gravitational tides in the volcanism generating heat as well as internal and apparently breaking efforts on the bark, the other theory, that of self-sustaining dynamo, was abandoned in the 60 after the Webber et al study that concluded it was not factible.Personalmente doubt a major influence of the gravitational pull on volcanism.
[bron]

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Current Volcanic Islands (AVCAN) The truth is that this is scientifically proven in some volcanoes .. I leave the google translation arranged more or less of the item (Enrique):

Influence of fortnightly Earth tides at Kilauea Volcano, Hawaii

Daniel Dzurisin
U.S. Geological Survey, Hawaiian Volcano Observatory, Hawaii Volcanoes, National Park, Hawaii 96718

Analysis of 52 historic eruptions confirms the premise that fortnightly earth tides play a significant role in triggering activity at Kilauea Volcano, Hawaii. Since January 1832, nearly twice as many eruptions have occurred nearer fortnightly tidal maximum than tidal minimum (34 vs. 18). A straightforward significance test indicates that the likelihood of a fortnightly tidal influence on Kilauea eruptions is roughly 90%. This is not the case for Mauna Loa Volcano, where 37 historic eruptions have been distributed randomly with respect to the fortnightly tide. At Kilauea, stresses induced by fortnightly earth tides presumably act in concert with volcanic and tectonic stresses to trigger shallow magma movements along preexisting zones of weakness. Differences in structure or internal plumbing may limit the effectiveness of this mechanism at Mauna Loa. Tidal effects seem to be less marked at shields than at some islandarc volcanoes, possibly because higher average volcanic stress rates in Hawaii more often override the effects of tidal stresses.

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Update 21/02 – 23:55 UTC
- We are ending the day with 15 earthquakes. 2 of these earthquakes had a magnitude equal or greater than 2.0
- A news article from Spanish news agency EFE, published in La Información (in Spanish), states that several boats will map the ocean depths of El Hierro. Below a summary of the article translated to English:
“The government will start from March 1st a bathymetric survey program (study of the deep ocean) on the island of El Hierro in order to continue monitoring the underwater volcano. This decision was taken today at a meeting chaired by the General Director of Civil Defense and Emergencies, Juan Antonio Diaz Cruz. These actions will take place as long as the eruption continues.
A schedule for the months of March, April and May has been set, with different vessels assigned to do the bathymetry with a periodicity of about 7 to 10 days. Boats will be from the State Navy, Police, Marine Rescue Society, Ministry of Fisheries and Department of Customs.”

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At the risk of being wrong, in the absence of more data comparing the time of arrival of the wave seismographs of the other islands and the data from the USGS, this morning, we had what we understand as a new event in Long Term, typical stratovolcanoes and comienzarían to appear in the system El Hierro, now isolated, the eruptive tremor and apparent shape. An LP, or event of long period, it is a harmonic moviento ie, resonance in a musical note and its harmonics, such low frequency that are not audible, but produced in volcanic conduits for fluids magma. These tubes act as the pipes of an organ. In the seismogram, are characterized by a very slow signal impairment that occurs, generating waves of various kinds. Enclosed is a summary of the most characteristic types of LPs, so they can "play" to classify and find out if indeed this is an LP (JR).


En een PDF

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Update 23/02 – 08:17 UTC - is El Hierro resembling Hawaii ?
- The earthquake activity continues as IGN listed 6 earthquakes so far today
- In our title we talk about Hawaii. Why ? Because a lot of scientists (not all of them) are convinced that both Hawaii and El Hierro are Hot Spot volcanoes, this contrary to subduction volcanoes like the Andes volcanoes (subduction means that the Oceanic plate dives below the continental plate and that part of the re-melted oceanic plate does create volcanoes by fissuring into the continental plate.

In case of Hot Spot volcanoes, we are (simplified) talking of weak points in the oceanic plates. The solid rock part of these plates (the crust) is very thin (10 to 15 km), below this thickness a variety of hotter material creates other sections (that is one of the main reasons why most of the earthquakes are occurring at a depth of 10 km or more). Magma tries to find weak areas in this material. This process can be found all over the ocean floors where hot vents and submarine volcanoes (if extinct also called seamounts) are doing exactly the same (there are thousands of them).
The Kilauea volcano on Hawaii, Hawaii (the big island) is just like El Hierro the youngest island of a volcano chain that grew above sea level. The older islands are moving away from the weakest point by the normal moving oceanic plates (10 to 100 mm per year depending on the location, which makes hundreds of km’s over millions of years). Maui, another extinct volcano island in the Hawaiian chain can be compared with La Palma, second youngest island in the Canary island chain.

The Kilauea volcano at Hawaii is constantly active since many years. Some periods are calm, but nevertheless the lava lake is partly filled and the eruption continues by channeling magma through lava tubes to the ocean. At regular times the eruption process intensifies and creates high intensity eruptions like a full crater lake, creating a stream of lava or even rift eruptions along the crater line. What El Hierro experiences at the moment is almost the same. Early November, a submarine rift eruption occurred (see video and pictures Guardia Civil / Involcan) and since many months the cone builds up by flowing lava (even today with limited HT).
Main difference with Hawaii : the depth of most of the earthquakes. The cracks in the Hawaiian crust are in average at a depth of 4 to 6 km, a lot shallower than the average El Hierro quakes.
We hope that “Wally” the ROV on board of the Atlantic Explorer will soon give us a proof of what is happening near the El Hierro main vent. If the crew of the Atlantic Explorer would succeed in delivering footage of the eruption, it would be a big blame to the other agencies working on this eruption.

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Update 26/02 – 17:53 UTC
- Strong degassing is currently going on
- 6 more earthquakes and 10 in total. Depth in between 10 and 12 km
- minimal harmonic tremor even with this strong degassing

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Update 28/02 – 19:20 UTC
- The depth of the cone is now 100 meters according to twitter from Cabildo de El Hierro, @PrensaElHierro. They also comment that there is a decrease in seismicity, deformation and gases release.

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NOTE AVCAN 464 - QUAKE-VOLCANIC ACTIVITY - IRON ISLAND - FEBRUARY 29 2012-11:00 pm peninsular - seismic-volcanic activity remains moderate, with seismicity today in the area of side peaks at the height of Julan Tanganasoga. Yesterday was in the del Golfo escarpment east of Tanganasoga and in the sea de las Calmas. Continues to be quite microseismicity detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of La Restinga, which remains low but is rising from day before yesterday, so it has already doubled the signal strength. New earthquakes five low Revised manitud +11. Magnitude of the new earthquakes between 1.7 and 0.8. Depths to 7.4, 8.6, 11.0, 11.6, 16.8 km). Yesterday 14. Yesterday 8. 3 are today. A total of 12,466 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

DAY 29 FEB EARTHQUAKES. - Light green (3)
DAY 28 FEB EARTHQUAKES. - Light green (8)
DAY 27 FEB EARTHQUAKES. - Violet (14)
DAY 26 FEB EARTHQUAKES. - Pink (22) - 10 new

The earthquakes in recent days continue to occur in the NNE-SSW alignment from Frontera Sea de las Calmas and another thing to think that earthquakes are concentrated in the central area of the island and there are some more in the Mar de las Calmas. (Enrique)

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Update 28/02 19:20 UTC
- The depth of the cone is now 100 meters according to twitter from Cabildo de El Hierro, @PrensaElHierro. They also comment that there is a decrease in seismicity, deformation and gases release.

quote:

@PrensaElHierro
The process of normalization of the eruptive process in # ElHierro. The cone is 100 meters, according to IEO.

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Update 02/03 – 23:42 UTC
- 4 more earthquakes , which bring the total to 5 today. Magnitudes were higher in average than during preceeding days : 1.8, 1.3, 1.9, 1.5, 2.0 and 1.2
- At least 2 faint jacuzzi’s today
- A further slight increase in HT (thank you ER reader Volcanomen). Wind is sometimes a disturbing element, but not in this case. Wind goes mostly down after sunset and the sea was rather calm tonight although HT still grows bit by bit. It cannot be excluded that HT suddenly inflates again. Lets keep our eyes open the following hours as any increase in activity may be well seen at the surface waters.
- The webcam has been set to very sensitive vision tonight. If a jacuzzi would form it will be easy to see it on the present settings.
- The webcam operator has been focusing on the sunset tonight ? The webcam turned into a romantic observer !

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NOTE AVCAN 467 - QUAKE-VOLCANIC ACTIVITY - ISLA DEL HIERRO - 03 MARCH 2012-11:30 h peninsular - seismic-volcanic activity remains moderate, with seismicity in the summit today and one in the sea de las Calmas. Yesterday afternoon at sea to N del Golfo, the del Golfo escarpment and the area of peaks, also give the Mar de las Calmas in NNE-SSE alignment. Continues to be quite microseismicity detected but not located in the spectrogram. Continued volcanic tremor signal in the eruption of the Restinga, which remains low even from the day February 26 is rising slowly but surely, now more than three times the lowest signal that day. New earthquakes 9. Magnitude of the new earthquakes between 2.2 and 1.2. Depths 10.6 and 13.8km (and two in a row to 21.0 and 24.2km). Yesterday 8. Yesterday 7. 4 are today. A total of 12,492 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

MAR. - Dark Blue (4)
DAY 02 MAR EARTHQUAKES. - Yellow (7)
DAY 01 MAR EARTHQUAKES. - Light Blue (8)
DAY 29 FEB EARTHQUAKES. - Red (4)
DAY 28 FEB EARTHQUAKES. - Light green (8)
DAY 27 FEB EARTHQUAKES. - Violet (20) - 6 new
DAY 26 FEB EARTHQUAKES. - Pink (22) - 10 new

The seismicity map of what we have today concentrated 3 close together in the area of peaks and a solo by el Golfo while yesterday afternoon from the N in the Sea to the south through all areas but lining up some in the directions NNE-SSW and NNW-SSE. The previous day there is seismicity is diffuse in the Mar de las Calmas, the Julan, in el Golfo. On 29 morning in the area of side peaks at the height of Julan Tanganasoga. the 28 was in the del Golfo escarpment east of Tanganasoga and in the sea de las Calmas. The earthquakes in recent days and the new revised from 26 and 27 were continuing in the NNE-SSW alignment from Frontera Sea de las Calmas and another thing to think that earthquakes are concentrated in the central area of the island and there are some more in the Mar de las Calmas (Enrique).

1129851 02/03/2012 17:06:55 27.6632 -18.0436 13.8 1.9 mbLg SW EL PINAR.IHI
1129860 02/03/2012 19:27:57 27.8900 -18.0802 21.0 1.5 mbLg NW FRONTERA.IHI

1129854 02/03/2012 19:28:10 27.8152 -18.0645 24.2 2.0 mbLg NW FRONTERA.IHI
1129866 02/03/2012 22:25:43 27.7052 -18.0553 12.2 1.2 mbLg W EL PINAR.IHI
1129878 02/03/2012 22:59:39 27.7300 -18.0455 12.1 1.4 mbLg SW FRONTERA.IHI

1129879 03/03/2012 01:09:12 27.6656 -18.0647 1.4 mbLg SW EL PINAR.IHI
1129909 03/03/2012 06:41:42 27.7108 -18.0378 11.5 1.5 mbLg W EL PINAR.IHI 12490

1129908 03/03/2012 06:41:58 27.7158 -18.0329 10.6 1.7 mbLg W EL PINAR.IHI
1129910 03/03/2012 06:59:44 27.7123 -18.0344 11.0 1.2 mbLg W EL PINAR.IHI

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Update 06/03 – 15:25 UTC
- The red alert in the volcanic area of El Mar de las Calmas has been lowered to Yellow Alert, pre-emergency phase. The rest of the island will continue in yellow alert.
- The exclusion of areas of Arenas Blancas, Tacorón and Playa de Los Mozos will be also relaxed once a new document is released, soon, with the details of a smaller exclusion area. For now, the 4 mile maritime exclusion will remain.
- Recommendations for not swimming, fishing and scuba-diving will remain in place until new samples from the water in the area are analysed by the public health service, which could mean also these measures to be relaxed.
- All this information, in Spanish, from the press release here.

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Undersea Eruption Emergency Ends in Spanish Island

Madrid, Mar 6 (Prensa Latina) The authorities in the Canary Islands decreed on Tuesday the end of the emergency phase in the underwater volcano eruption area started in October last year at El Hierro Island, as informed by head of the Volcano Risk Civil Protection Plan in the Canary Islands (PEVOLCA), Javier Gonzalez.

He said the red alert in La Restinga fishing town was changed to yellow (pre-emergency) now.

The decision was announced a day after the scientific committee of PEVOLCA proclaimed the end of the volcano eruption registered in Las Calmas Sea, south of El Hierro Island.

Experts consider that though there is still some seismic activity, the eruptive phenomenon has concluded, six months after its start.

According to Carmen Lopez, from the National Geography Institute, the eruption phase has ended because no evidence of gasification or emission of material to the surface has been registered, in relation to the eruptive process started in October.

"We are still registering seismic activity, an indicator that the volcanic process is still on," she added.

According to the latest data registered in the area, the main cone of the undersea eruption is 288 feet from the surface.

Since mid July, 2011, El Hierro, the smallest, least populated island of the Canaries archipelago (268 square km and more than 10,000 inhabitants), has suffered over 11,000 quakes caused by magma activity on its subsoil.

The most powerful of them, of 4.6 degrees, was registered on November 11, 2011, and was also felt in Tenerife and La Palma islands.

The Canaries autonomous community is the active area with greater seismology risk in Spain, according to the country's Geology and Mining Institute.

Four of the Caraty Islands have historic volcanoes: El Hierro, La Palma (the Teneguia volcano), Tenerife (Teide volcano) and Lanzarote (Timanfaya volcano). La Restinga's eruption has been the first in this European country since 1971, when the Teneguia volcano erupted.

quote:

NOTE AVCAN 471 - QUAKE-VOLCANIC ACTIVITY - ISLE DEL HIERRO - 07 MARCH 2012-12:30 h peninsular - seismic-volcanic activity remains moderate, with seismicity Today at Sea de las Calmas and west of the Island in the Sea, and yesterday in the sea de las Calmas, all in a NW-SE alignment. Microseismicity continues to be detected but not located in the spectrogram CHIE sensor. Continued volcanic tremor signal in the eruption of Restinga, increasing in the last 24 hours, although the signal remains low. The traffic light area is no longer eruptive or Red Siege to move to Amarillo to be terminated from the emergency phase of the PEVOLCA yesterday. All Island continues with the yellow light indicates volcanic risk alert, have more than one abnormally relevant parameter from the mean.

New earthquakes 3 +1 reviewed. Magnitude between 1.9 and 1.5. Depths to 7.1, 10.7 and 37.2km. Yesterday 4. Yesterday 2. Today will 2. A total of 12,512 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).


DAY 07 MAR EARTHQUAKES. - Pink (2)
DAY 06 MAR EARTHQUAKES. - Red (2)
DAY 05 MAR EARTHQUAKES. - Light Green (4)
DAY 04 MAR EARTHQUAKES. - Brown (2)
DAY 03 MAR EARTHQUAKES. - Dark Blue (7)
DAY 02 MAR EARTHQUAKES. - Yellow (7)

In simicidad map of the last days, as today is again in the sea de las Calmas and a very deep (37.2) to the west of the island in the Sea Yesterday seismicity was located in the sea de las Calmas , and with today are all in a NW-SE alignment with one of previous days. Before yesterday we had 4 earthquakes aligned in a NNE-SSW in Frontera, the Julan and the Mar de las Calmas. On March 4 there were two in the Julan. On March 3 there were 4 earthquakes close together in the area of peaks at about 10-12km and the rest of the seismicity in the Mar de las Calmas. On day 2 we had instead more and more moderate seismicity N, in the sea of the Gulf, the Gulf and area of peaks and one in the Mar de las Calmas (Enrique).

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Update 08/03 – 18:51 UTC
IEO the Spanish Oceanographic institute has released the results of the 11th bathymetry session (BIMBACHE1011‐11) . The cone depth was revealed already in the beginning of the week (88 meter depth).

La Restinga, El Hierro 10th March - Waves or Jacuzzi? 18:55 - 19:55 UTC

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The eruption of the Mar de Las Calmas is ongoing against the decisions of PEVOLCA, IGN and authorities (Fernando)

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Update 14/03 – 16:00 UTC – IMPORTANT UPDATE!
- The Atlantic Explorer has been able to obtain images of the volcano! They are the first to capture the submarine volcano in ‘El Mar de las Calmas’. The crew of QSTAR along with members of ‘Universidad de las Palmas de Gran Canaria’ and SOS Océanos worked very hard for this achievement. We should expect a detailed report tomorrow as Joke Volta reports.

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Update 15/03 – 22:31 UTC
- AVCAN reports that the Atlantic Explorer ROV Wally has fairly good images of the crater, gas emitting vents and even lava streaming out of the crater ! (what would e really a surprise as the PEVOLCA scientists have claimed that the eruption has ended.
- The ACN press / El Pinar webcam will end his broadcast on March 17. We have to admit that with tyhe present activity, the ACN press webcam was not important anymore as jacuzzi and stain are to faint to be seen
- Maria from SOS Oceanos wrote us in the morning that the ROV pictures will be published “when the University of Las Palmas” thinks it is opportune to do so. Well, we will have to wait then. The law of scientists and Universities is prevailing. The University of Las Palmas has chartered the Q-Star Atlantic Explorer and the ROV and keeps the images first for scientific purposes. We will bring it to you as soon as it is published.

Banco de peces que convive con el volcán submarino.avi

Flanco suroeste del cono principal del volcán submarino.avi

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VERY IMPORTANT Update 19/03 – 17:02 UTC
- ER reader Roland (see comments) has given us the lead to a report of the University of Las Palmas de Gran Canaria showing the still erupting submarine El Hierro volcano at a depth of 70 meter (this is 18 meter less than the last published data from the IEO High Tech bathymetry equipment!). What nobody could accomplish so far, has been done by the quite simple ROV E-Wally on board of the SOS-Oceanos, Q-Star, Atlantic Explorer ship by the scientists of the Universidad de Las Palmas the Gran Canaria.
- The images have been captured on March 14 as the date on the images reveal. The images are of course foggy as a lot of suspended material is polluting the water.
- No doubt that Q-Star and the University has also some video footage that they will probably release later on (the pictures are probably screen captures of the video).
We are however VERY PLEASED that all those who cooperated on this mission have proved :
a) that the depth of the erupting cone has decreased to 70 meter
b) that the eruptive process is not yet entirely finished (at least it was not after the date that Pevolca said that the eruption stopped).
Joke was “very excited” on March 14 after talking to the crew of the Atlantic Explorer as they stated already then that the ROV made images of glowing lava. As we could not see these images, we brought the news rather minimal.

quote:

Update 03/04 08:01 UTC
Is this a sign of the awakening of the volcano ? To early to tell, but what we have seen so far today is the renewed activity of the feeder area at El Golfo. 3 of the 4 earthquake epicenters are located in the El Golfo area. The strongest M2.5 quake below the (new) volcano-vent itself.
4 earthquakes since midnight, the last one being the strongest. The 2.5 earthquake will have been surely felt by islanders and brings the memories back from the multiple earthquake they have felt a couple of months ago.

Update 02/04 18:43 UTC
- A video published by IGN shows a lot of degassing effects at depth of 100 to 150 m. We believe that the video has been captured by the Salvamar during his excursions the last couple of days. The water was very clear while videotaping? We congratulate CSIC with this video.

Así está el volcán de El Hierro.mpg

quote:

Update 16/04 – 12:42 UTC
- 2 serious earthquakes in a matter of 12 minutes (Thank to ER reader Diana for telling us)
At first a Magnitude 3.1 earthquake at a depth of 14 km to the SW of El Pinar
followed by a second M2.2 earthquake at a depth of 1p km also to the SW of El Pinar

quote:

Update 19/04 – 12:09 UTC
- In a short twitter message from the Cabildo de Hierro (office of Mr. Alpidio Armas), the Green Alert of the entire island has been declared by Pevolca. Due to the very slim activity of the last couple of weeks (only faint stains and degassing), the Alert level change seems logical to Earthquake-Report.com

twitter:

eruptionsblog twitterde op woensdag 09-05-2012 om 15:31:48 Check out this underwater video of the degassing lavas from the El Hierro eruption taken May 2:

Nuevas i‪mágenes del volcán submarino de El ‪Hierro

(via @PrensaElHierro) reageer retweet

quote:

Forty years after the Teneguía Volcano (La Palma, 1971), a submarine eruption took place off the town of La Restinga, south of El Hierro, the smallest and youngest island of the Canarian Archipelago. Precursors allowed an early detection of the event and its approximate location, suggesting it was submarine. Uncertainties derived from insufficient scientific information available to the authorities during the eruption, leading to disproportionate civil protection measures, which had an impact on the islands economy based primarily on tourism, while residents experienced extra fear and distress.

quote:

Update 14/06 – 13:00 UTC
- An increasing number of earthquakes, what is called an earthquake swarm, took place in the early hours this morning. Up to 19 earthquakes in less than 3 hours. Magnitudes have been high, with one reaching M 2.8. All depths in between 19 and 26 km. According to IGN this is normal and part of the seismic process and not the eruption.
-Map done by AVCAN website with full list of earthquakes here:

Event Date Time Lat Lon Depth
(km) Mag Location
1148498 14/06/2012 04:00:02 27.7251 -17.9972 20 0.5 NW EL PINAR.IHI
1148500 14/06/2012 04:32:09 27.7622 -18.0380 22 1.5 W FRONTERA.IHI
1148507 14/06/2012 04:40:20 27.7481 -18.0339 20 2.3 W FRONTERA.IHI
1148514 14/06/2012 04:46:49 27.7432 -18.0379 23 1.4 SW FRONTERA.IHI
1148515 14/06/2012 04:52:39 27.7834 -18.0411 24 1.9 NW FRONTERA.IHI
1148530 14/06/2012 04:59:27 27.7873 -18.0422 21 1.3 NW FRONTERA.IHI
1148531 14/06/2012 05:00:00 27.7596 -18.0381 26 1.4 W FRONTERA.IHI
1148542 14/06/2012 05:14:10 27.7519 -18.0415 22 1.6 W FRONTERA.IHI
1148536 14/06/2012 05:15:10 27.7306 -18.0264 22 1.9 SW FRONTERA.IHI
1148544 14/06/2012 05:22:16 27.7896 -18.0447 20 1.7 NW FRONTERA.IHI
1148546 14/06/2012 05:27:00 27.7569 -18.0432 23 1.3 W FRONTERA.IHI
1148547 14/06/2012 05:34:31 27.8004 -18.0500 19 1.3 NW FRONTERA.IHI
1148549 14/06/2012 05:34:56 27.7735 -18.0356 21 1.5 NW FRONTERA.IHI
1148559 14/06/2012 05:41:04 27.7853 -18.0509 21 1.8 NW FRONTERA.IHI
1148561 14/06/2012 05:54:22 27.8062 -18.0488 20 1.8 NW FRONTERA.IHI
1148562 14/06/2012 06:01:52 27.7644 -18.0395 22 2.3 W FRONTERA.IHI
1148563 14/06/2012 06:05:07 27.7794 -18.0525 22 2.8 NW FRONTERA.IHI
1148565 14/06/2012 06:06:20 27.7726 -18.0591 23 2.7 NW FRONTERA.IHI
1148568 14/06/2012 07:48:40 27.8015 -18.0680 21 2.1 NW FRONTERA.IHI

QSTAR - ULPGC VÍDEO DE GRAN INTERÉS DE LA FILMACIÓN DEL VOLCAN SUBMARINO CON EL ROV

quote:

Update 25/06 01:03 UTC
- our hispanic colleagues from AVCAN are requesting the authorities (IGN, Pevolca, ) to confirm or deny officially that a new eruptive vent has been opened. The current tremor shows increasing magma movement and AVCAN says that the population of El Hierro has to right to know what is happening below their island.

quote:

1150917 25/06/2012 11:07:20 28.3512 -16.2121 17 Sentido 3.0 mbLg ATLÁNTICO-CANARIAS [+]
1150930 25/06/2012 09:24:56 27.6966 -18.0744 18 2.7 mbLg W EL PINAR.IHI [+]
1150922 25/06/2012 09:09:40 27.7017 -18.0685 18 2.8 mbLg W EL PINAR.IHI [+]
1150860 25/06/2012 09:03:44 27.7056 -18.0741 19 III 3.8 mbLg SW FRONTERA.IHI [+]
1150910 25/06/2012 08:41:05 27.7079 -18.0669 19 2.9 mbLg SW FRONTERA.IHI [+]
1150904 25/06/2012 08:40:32 27.7050 -18.0729 20 2.6 mbLg SW FRONTERA.IHI [+]
1150900 25/06/2012 08:34:16 27.7331 -18.0706 19 2.7 mbLg SW FRONTERA.IHI [+]
1150890 25/06/2012 08:26:26 27.7305 -18.0658 19 2.3 mbLg SW FRONTERA.IHI [+]
1150889 25/06/2012 08:10:13 27.7287 -18.0620 18 2.6 mbLg SW FRONTERA.IHI [+]
1150888 25/06/2012 08:03:48 27.7141 -18.0781 19 2.5 mbLg SW FRONTERA.IHI [+]
1150887 25/06/2012 07:47:21 27.7149 -18.0806 19 2.5 mbLg SW FRONTERA.IHI [+]
1150885 25/06/2012 07:43:09 27.7227 -18.0685 19 2.6 mbLg SW FRONTERA.IHI [+]
1150869 25/06/2012 07:37:13 27.7233 -18.0838 18 2.4 mbLg SW FRONTERA.IHI [+]
1150866 25/06/2012 07:36:51 27.7190 -18.0732 19 2.0 mbLg SW FRONTERA.IHI [+]
1150865 25/06/2012 07:31:30 27.7337 -18.0812 18 2.1 mbLg W FRONTERA.IHI [+]
1150854 25/06/2012 07:11:08 27.7165 -18.0680 18 2.3 mbLg SW FRONTERA.IHI [+]
1150851 25/06/2012 06:51:35 27.7249 -18.0535 18 2.8 mbLg SW FRONTERA.IHI [+]

quote:

Update 25/06 11:12 UTC
- For those readers thinking that the current HT is an eruption, we have to deny this. This is mainly magma movement. A real eruption, like in early November, will show an almost FULL HT graph.
Since a few weeks ER is publishing a daily Volcanic Activity (Volcanic Seismicity) post (daily posts since 2 days). These posts are showing clearly what you should see when a real eruption is taking place. Example 1 Example 2 Example 3

Update 25/06 10:56 UTC
- IGN has not listed new earthquakes since 2 hours now, but is still adding ones who occurred before 09:03 UTC. Their current number is 61
- Based on the CHIE HT graph, more earthquakes are occurring since the latest M3.8 earthquake.
- HT seems to be calmed a little, but this means only that the Magma transport is probably blocked by a plug in the lava tubes system. It may take another strong quake or some time to open this.

Update 25/06 10:27 UTC
- 55 earthquakes listed so far today by IGN (in reality these are only the strongest ones bigger than 1.5). On a few exceptions all of the listed earthquakes are +M2.0. We would not be surprised that the real number of earthquakes (including the very weak ones which were included in the beginning of the eruption) would run into the hundreds (of course speculative).
- We are also convinced that if the eruption would be reactivated in the same cone at 88 meter of depth (like what happened in early November), a Surtseyan eruption will happen very rapidly. (Less than 100 meter is considered as a depth that Cypressoide action can start)
The location of the cone in the Las Calmas sea is far enough out of the coast to be considered as not dangerous for the population of the island. Only northern winds (which only happen now and then) can make a difference to that scenario.
At earthquake-report.com we think that the time has come to reinstall the WEBCAMS and to STOP PLAYING POLITICS (hiding information to the open public).

Update 25/06 10:12 UTC
- We are acquiring a Magnitude level that the main seismological agencies in the world will be picking up and reporting the El Hierro earthquakes. Mostly they start reporting from M4.0 onwards. Our own Daily complete list of earthquakes has been picking up the + M2.5 earthquakes.
- The last reported earthquake by IGN was at 09:03, but we see a number of new earthquakes since then on the HT graphs (bigger amplitude lines for some seconds).
- The current earthquake depth is not dangerous for the people on the island. BUT . if the magma finds its way up and a few extremely shallow quakes occur (less than 3 km) an eruption can occur in a short time. In many cases a M 4+ earthquake triggers the eruption when magma channels are blocked.
- We trust on IGN to follow up the depth and the most recent set of the earthquakes with their SECRET data.

Update 25/06 09:45 UTC
- Events are getting stronger and stronger. The strongest quake so far is a M3.8 at a depth of 19 km at 09:03 UTC. The earthquake was felt as an MMI IV (light shaking) at some parts of the island.
- We expect a PEVOLCA report much sooner than their proposed afternoon meeting as the strength of the quakes is getting stronger and stronger. So far the depth remains at approx. 20 km, but
- There is a tendency that the epicenter of the quakes moves gradually to the earlier Las Calmas sea area (towards the earlier eruption cone).
- If the present set of earthquakes keeps getting stronger, all options are open, but surely a new eruption is imminent.
- Of course we have to be prudent to predict what would probably comes up, but the authorities have chosen NOT to share all available data with the public. We do not know at this time how the following parameters are changing : recent GPS inflation values (horizontal and vertical), micro-earthquakes, gas emission, etc.

Update 25/06 -09:05 UTC
- The comment section was automatically closed after 270 days (yes 270 days ). ER reader Colin attracted our attention to it and it has been reopened (thanks Colin).
- PEVOLCA (committee of scientists and Safety people) will be meeting this afternoon and will be discussing the report of the IGN specialists). Until then, we do not expect any official news.
- AVCAN has mapped the quakes reported by the IGN (see below). The violet bullet the M3.4 of today, the red bullets are todays earthquakes (38), the green bullets those of yesterday (16) and the yellow bullets the 120 quakes from June 1 to June 23.

Animation of Earthquakes El Hierro 24-25th June.

quote:

Update 25/06 18:12 UTC Pevolca press report (Gobierno de Canarias)
To most people, the decision of Pevolca will come as a surprise no special precautions whatsoever, not even at El Julan where most of the earthquakes are centering now.
The Pevolca decision is however motivated by the lack of deformation of the island, by the depth of the earthquakes and by the lack of gas emissions. 20 km is ok for IGN and INVOLCAN (scientific partners in Pevolca).
The press report is also stating that IGN is following up the earthquakes in Realtime (not 2 hours behind schedule like they do with the public). Lets hope IGN and PEVOLCA have taken the right decision. We have to stress that they have been always right so far.
Lets make however an important remark : the route towards the traditional submarine cone seems still to be blocked and we still have earthquake close to M3 going on. If a major M+4 occurs, all scenarios are open.

Update 25/06 18:55 UTC
- Seismicity is calming considerably the last couple of hours. It seems that the volcano has listened to the Pevolca board .
- 121 M+2 earthquakes until 17:37 UTC today (149 total M+1.4) (This does not take into account the probably hundreds of earthquakes below M1.4 which were registered in 2011, but are only visible now for the IGN and INVOLCAN volcanologists).

quote:

Update 26/06 11:07 UTC
- 89 earthquakes so far today (IGN is still adding continuously).
- The location of the epicenter remains below the island and the hypocenter behave normal (18 20 km).
- The stronger earthquakes are in the M2.9 to M3.1 range. Most of the earthquakes are stronger than M2.0.
Important Update 26/06 10:30 UTC
- What looks in the seismogram as being a lot less activity than yesterday is not completely true as only the Harmonic Tremor (magma flow) has almost stopped completely. The accumulated pressure of the magma below the island is still very strong.
- Until 08:42 UTC, 77 earthquakes have been listed by IGN (M1.3 or stronger)

Joke Volta told us that she had felt the M2.9 which occurred this morning at 04:10 near El Pinar (05:10 local time). Joke lives in El Pinar. The IGN list, which is set up manually by IGN staff and is only published 2 hours after occurrence of the earthquakes, does not show a depth of this earthquake NOR does it show that this particular earthquake was felt by the people. Even more strange is that the depth of this earthquake has been plotted as EXTREMELY SHALLOW by the IGN plotted version of the quakes (see below). Why not mentioning the depth in the main list ? Are the values unsure ? The strength was strong enough to locate the depth (with an eventual error margin). We understand that a single shallow quake is not enough to be conclusive, but hiding information is from the past century.

quote:

DISCLOSURE NOTICE INVOLCAN:

Urgently inform the records of the observed shift of the GPS network Canaria (Nagoya Univ ITER + + GRAFCAN) operating Volcanic Canary Island Institute under the direction of Dr. Takeshi Sagiya (Professor of Nagoya University and Scientific Collaborator INVOLCAN .)

GPS STATION PINA (El Pinar)

During the last 2 days there has been horizontal eastward displacement of 3 cm and north of 1.5 cm and a displacement in the vertical (elevation) of 3 cm.

These deformation data clearly reflect a process of movement of magma underground and the source responsible for this deformation is in the central-western part of the island of El Hierro in conjunction with data from recent seismic activity.

The movements recorded during the last 2 days are real and much faster than those observed last year 2011.

quote:

Update 27/06 09:58 UTC

- Deformations, as described in the Involcan maps and report below, are generated by the Magma pressure and are one of the major indications to predict eruptions. Together with the strength of the earthquakes, the depth of the hypocenters and the emitted gases, they are used by volcanologists to send alerts and warnings to the public. The mitted gases are the uncertain factor in this case but didnt we hear a couple of months ago that some sampling points were dismantled ?

- The Involcan informative note is a real blame to the IGN and PEVOLCA communications policy. These organizations should review their communication policy urgently. We live in 2012 and when people feel the earth shaking almost constantly like in Sabinosa, you cannot get away with a message that the state of the island is normal, even if this is scientifically true. We know that we are repeating ourselves over and over again but the present situation becomes hallucinate.

quote:

DISCLOSURE NOTICE INVOLCAN:

In the attached graph can observe the number of earthquakes above magnitude 2.5 have occurred since last year, thus covering the entire period of the process that is lived on the island of El Hierro. As you can see, in these last 48 hours the records of these earthquakes per day outnumber (enventos every 24 hours) than those recorded during the past year, which speaks of the power capacity of the process that is occurring now up on the island. So far identified 92 such events on 25 and 87 on 26.

twitter:

teideano twitterde op woensdag 27-06-2012 om 14:53:08 @eruptionsblog @rschott @Suw @Lumifg @pabloj_gonzalez @emsc @CPPGeophysics http://t.co/CFoOv2z8 Yellow alert at El Hierro reageer retweet

quote:

DISCLOSURE NOTICE INVOLCAN

This image shows the evolution of the moving average daily flow of carbon dioxide diffuse registered in the ITER HIE01 geochemical station and the daily number of earthquakes located by the national seismic network of ign. The data recorded in the HIE01 until Wednesday June 27th, 2012 at 08:00 am show relatively low values ​​(average of 4 grams of carbon dioxide per square meter per day). Also you can see a pulse on the diffuse flux of carbon dioxide recorded from April 7 to May 20, 2012 that could be interpreted as a possible precursor signal of the recent seismic activity-strain that is being registered in El Hierro. It allows you to share this information but do not allow the dissemination and reproduction of this image without permission of INVOLCAN.

quote:

Important Update 27/06 12:32 UTC
Pevolca calls a Yellow alert in the unpopulated earthquake zone. In a live interview on RTVC, the local Canary Island TV and Radio station, María josé jurado has declared that the El Julan and La Dehesa area will be labeled as Yellow Alert area. Besides a church and a lighthouse, this area is unpopulated.
The move sounds logic to ER as the direct treat to other areas for eventual earthquake damage is very limited. Earthquakes are the main risk at this moment.

twitter:

eruptionsblog twitterde op woensdag 27-06-2012 om 15:39:48 Alert status raised to "Yellow" for parts of El Hierro as seismicity and carbon dioxide emissions continue to increase: http://t.co/lp9BND5t reageer retweet

twitter:

canariesnews twitterde op woensdag 27-06-2012 om 15:45:25 Alert level raised to 'yellow' on El Hierro due to recent seismic activity - http://t.co/pxkbo2qc reageer retweet

quote:

Update 27/06 – 16:36 UTC
Almost all the recent earthquake’s epicenters are gradually migrating south into the Las Calmas sea. The denomination ” SW FRONTERA” are gradually replaced by “W EL PINAR” when the epicenter is located in the Las Calmas sea.
The migration to the new area can also be observed in the existence of harmonic tremor which started also around 14:00 UTC.
It looks now that HT is diminishing again and that the earthquakes will remain in the same area until new HT appears (possibly started by some strong earthquakes).

quote:

Update 27/06 – 19:45 UTC
The earthquakes epicenters are currently located at the same area where it all started on September 27, 2011. The depth at that time was approx. 15 to 17 km. The current depth is more in the 19 to 21 km range . The difference in between the 2 layers is a couple of kms. (All our readers can come to the same conclusion in comparing the location and the depth of the 10 days of earthquakes who started on September 27 and todays location of the quakes). All this is not conclusive in what will happen next.

Update 27/06 – 19:01 UTC
Joke has just SMS’t (texted) that she has felt a strong shock in El Pinar.
The earthquake Joke has just reported was a M4.0, the strongest earthquake since last year.
As you will be seeing on the map, the epicenter is located below the Las Calmas sea floor.
18:55:08 27.6883 -18.1006 Depth 20 km Sentido M 4.0 mbLg W EL PINAR

quote:

Update 28/06 07:55 UTC
- At least the people of El Hierro must have had a good night sleep as the strength of the earthquakes decreased seriously the last 7 hours. But only the strong earthquakes were more or less silent at night.
- So far today IGN has listed 39 earthquakes since midnight, a little less than the preceding days, but still a high number.
- Harmonic Tremor has restarted strongly since 05:35 this morning, showing us that the volcanic process is still continuing strongly. As we have experienced the last couple of days, the current HT may refer to a new migration of the epicenters
- The strongest earthquake since midnight was a M2.8 earthquake. NO earthquakes since midnight have been marked as felt by the people. At ER we think that Felt or no felt indications are far from reality as most people do not indicate slight tremors anymore after having experienced stronger ones. Aftershocks in general are less documented. Only nations like Japan, USA and New Zealand are drilled to report whatever they have felt.
- The depth did not show a lot of difference since midnight with values in between 17.6 and 22.9 km
- The epicenter of the earthquakes since midnight remains the El Julan La Dehesa area of the island
- We certainly expect more earthquakes to come today as the process continues in full strength.
- What can change the process fundamentally ? Our readers should watch the following elements in the current process with more focus than the rest : Depth of the earthquakes (changes towards a depth of 15 km or less can be triggers of new events, sudden change in the strength of the earthquakes, the locations of the epicenters (these locations are important in relation to the conduits of the recent eruption)