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 imĂĄgenes de la mancha de emisiones volcĂĄnicas en la costa de El Hierro

Material piroclĂĄstico en superficie tras la erupciĂłn de El Hierro. DĂ­a 15-10-2011

ImĂĄgenes de la erupciĂłn el dĂ­a 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 volcĂĄn 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 ą 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 ą 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 ą 115 tons per day until mid-January, when he came to record an emission rate of 661 ą 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. żOr 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.