[breaking] Vulkaanuitbarsting bij Canarische Eilanden #2

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Op woensdag 19 oktober 2011 14:58 schreef Frutsel het volgende:

[..]

is ie toch al?

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20/10/2011 @ 08:40 According to the IGN, the El Hierro underwater eruption is slowing down. The tremors have decreased in intensity as have the number of earthquakes which would indicate that the current process is coming to its final stage.

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the geological evolution of the Canary Islands. Today at 20:00

The PhD in Geological Sciences and Research Professor Juan Carlos Carracedo CSIC also director of the volcanological station of the Canaries, presented this Thursday, October 20, the book I Geology of the Canary Islands in the Museum of Science Elder and Technology of The Palmas de Gran Canaria.

Professor of Geology at the University of Las Palmas de Gran Canaria Francisco Pérez Torrado will be responsible for performing the initial presentation of the act.

Juan Carlos Carracedo perform a review of the geological evolution of the Canary Islands. Will refer to the beginning of the old Canary by the action of a hot spot for more than 55 million years ago until now represented by the last eruption in the Canary Islands and the first underwater documentary, recently occurred in El Hierro, the youngest island of the archipelago .

The book launch will take place this Thursday, October 20th at 20.00 pm in the Elder Museum of Science and Technology of Las Palmas de Gran Canaria.

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Scientists confirm that the seismic process is losing momentum

The researcher of the Higher Council for Scientific Research (CSIC), Joan Martí, and responsible for Monitoring Volcanic National Geographic Institute (IGN), Carmen Lopez, have confirmed that the submarine eruption of El Hierro has expelled magma, which is still going abroad because samples of basalt "typical" in the Canary Islands that have been collected.

But noted that the magma "is coming out," Lopez said the tremor signal has been reduced progressively and that the deformations are stable, so it noted that the seismic process is losing strength.
Marti said that the eruption was not "too large" and dismissed the idea that an explosion soon, because the first phase tends to end, so that "we are returning to normal." In a second phase, said it was not until within weeks or months.
For this reason they will stay ahead of the equipment and scientific instrumentation on the island, which is higher than it had at the beginning of the volcanic crisis, "he said." Although the researcher found that the risk to the population has not been great so far, acknowledged that "caution is always short."
He recalled that from July to October were recorded on the island more than 10,000 earthquakes due to magma movement at first, adds, had a horizontal path, only to be vertical, reaching the surface. For scientists the peak was the bubbling was observed recently in the sea surface.
For Martí "things have been done right the first time" because it detected the "minimal changes" of the situation and "has occurred that was predicted."

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El Hierro Volcano about to end 'eruptive phase'

CSIC Scientists monitoring the volcanic eruptions on El Hierro, together with the National Geographic Institute (IGN), confirmed earlier this morning that the 'eruptive phase' of the volcano is now decreasing. However, this is not to say that the activity as a whole has come to an end as it is likely that the volcanic activity may move towards a further phase.

Scientists also confirmed that tremors on land associated with the volcanic activity had also subsided considerablly over the past few days.

Ground deformations, drinking water samples and lava samples are still being analyzed.
Carmen Lopez, for the IGN confirmed "What had been assumed from the outset is that it was an eruption of basaltic magma which reached a depth of 11 or 12 miles and has been moving for more than three months until it found a place to rise to surface, which is what it has now done."

The Volcanologist said how the submarine eruption began at 1,000 meters below sea level and had been moving north at a depth of just 200 meters, which is why the effects were seen on the surface.

Lopez stressed the importance of waiting for all current activity to cease before declaring that the eruptive process was about to enter a new phase as it wasn't unheard of for the same activity to re-start after a short break.

The scientists on the island are continuing to monitor the volcano, but believe that any threat to the population is "low".

VOLCANO EARTHQUAKES AND FISHES EL HIERRO

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20/10/2011 @ 16:25 – The tremors on El Hierro continue but have decreased in intensity.


20/10/2011 @ 16:22 So far today there have been 8 earthquakes around the island of El Hierro, as follows:

Date Time(GMT) Latitude Longitude Depth
(km) Richter
20/10/2011 14:16:32 27.6537 -18.1143 22 1.6
20/10/2011 13:37:10 27.6643 -18.0698 18 2.0
20/10/2011 11:49:10 27.7696 -18.0474 23 1.8
20/10/2011 11:46:34 27.7806 -18.0809 23 1.7
20/10/2011 11:40:15 27.7986 -18.0671 22 1.6
20/10/2011 11:08:29 27.6772 -18.0406 18 1.5
20/10/2011 09:19:33 27.9209 -18.1141 11 1.7
20/10/2011 00:13:27 27.6580 -18.0820 16 1.5

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El Hierro : Tunnel reopens but red alert remains

The evacuated residents of La Restinga on the island of El Hierro will be allowed to return to their properties as from from 08:00 on Friday due to the decrease of seismic activity. However, the authorities will maintain surveillance 24 hours a day in the likelihood of activity returning and a further evacuation being necessarry. The Los Roquille tunnel will open between the hours of 08.00 ro 20.00.

For the time being schoolchildren have been moved from the village to study at the town of El Pinar closeby.

The Los Roquille tunnel will only be open during daylight hours to begin with, however it may be permitted to open throughout the night depending upon the developments over the coming days.
With regards to the evacuations at La Frontera, a technical committee comprising of teh El Hierro local council, The Canary Islands Regional Government and the Geological and Mining Institute of Spain (IGME) have assessed the situation and are due to inform the owners if they may return to their homes.

PEVOLCA also confirmed that the state of alert remains as 'red', and that this is likely to remain the case until data suggests that the eruptions are over.

60 METERS FROM SEA SURFACE ALL WILL SEE THE FORCE OF VOLCANIC EXPLOSION!

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El planeador submarino Altair y la erupción en El Hierro

The Seaglider unmanned underwater glider 'Altair' in the Canary Islands Oceanic Platform (Plocan) began work on Wednesday (October 19) in waters of the Calm Sea, across from El Tacorón on the island of El Hierro. Its implementation is the main novelty in the research conducted by Professor Ignacio Lozano ship in the eruptive process occurred off the coast of El Hierro.

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Op vrijdag 21 oktober 2011 14:03 schreef bwt het volgende:
Stan - wat is de bron?

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El Hierro : Tunnel reopens but red alert remains

The evacuated residents of La Restinga on the island of El Hierro will be allowed to return to their properties as from from 08:00 on Friday due to the decrease of seismic activity. However, the authorities will maintain surveillance 24 hours a day in the likelihood of activity returning and a further evacuation being necessarry. The Los Roquille tunnel will open between the hours of 08.00 ro 20.00.

For the time being schoolchildren have been moved from the village to study at the town of El Pinar closeby.

The Los Roquille tunnel will only be open during daylight hours to begin with, however it may be permitted to open throughout the night depending upon the developments over the coming days.
With regards to the evacuations at La Frontera, a technical committee comprising of teh El Hierro local council, The Canary Islands Regional Government and the Geological and Mining Institute of Spain (IGME) have assessed the situation and are due to inform the owners if they may return to their homes.

PEVOLCA also confirmed that the state of alert remains as 'red', and that this is likely to remain the case until data suggests that the eruptions are over.

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El Hierro Coast to be Declared Area of Special Protection

The las Calmas area off the South-West coast of the Island of el Hierro, is to be designated an area of special Protection (SPA) by Ministerial order, after being affected by pollution from the stain created by the volcanic eruption over the last week.

SPA's are regarded as being under the protection of the crown, and intended to promote the conservation of migratory bird species, according to the draft that is available to the public by the Ministry of Environment, Rural and Marine Affairs .

The news SPA in the las Calmas area may not have affected the birds that nest on the ground, as they will look for food in deeper waters and not close to the coast, which is where the majority of the pollution has drifted, according to Antonio Lorenzo, from Tenerife SEO / BirdLife .
The ministerial order to comply with Law 42/2007 for Natural Heritage and Biodiversity . And the identification of SPA's comes "from an intense scientific work and earlier research." However, further research may result in new areas designated for the smae protection.

The new SPA will join the marine Natura 2000 network in Spain, a European system of biodiversity conservation.

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El Hierro : The Conspiracy Theories Keep Coming

It has become an impossibility to keep count of all of the activity in the recent earthquake swarm on the island of El Hierro, with latest estimates place the tally somewhere around 10'800 since activity first began back in July.

Indeed, the media's focus seems to have shifted from the frequency and intensity of the seismic activity going on underneath the island - which is still happening - to the progression of the eruptive phases of the underwater volcano, which, if what Scientists are telling us is to be believed, seems to be on the wane.

One thing, however, that does seem to be on the increase is the amount of conspiracy theories being floated on a number of forums and social networks on the web.
Accusations are abound of scientists and politicians deliberately manipulating analytical data in order not to panic the residents of the island in light of a further enormous Earthquake / Volcano / Tsunami / Elvis landing on the Island on a UFO (* delete as appropriate).

Perhaps the most popular conspiracy theory doing the rounds is that of the entire eastern seaboard of the USA being just hours away from disaster with a massive earthquake / Volcanic eruption causing a 300 ft tidal wave. Although the theory is not a new one by any means, with its likelihood being documented on the BBC Horizon program in the 1990's, there were 2 key points that need to be considered before our friends across the pond go in search of higher ground :

1. The documentary discussed the probability of an event that was though to have happened some 50'000 years ago, when an enormous landslide fell away from the North side of the island of El Hierro, accusing a Tsunami that has been widely thought to have been responsible for the creating of the Florida Everglades. Comparing the Island's Geology of 50'000 years ago to today seems obsolete.

2. The Documentary predicted what would happen in the event of the Caldera de Tabauriente, on the neighbouring Island of la Palma suffering a similar fate. Whilst it is generally agreed that any similar activity would cause an enormous landslide resulting in a 'Super-tsunami', which would be expected to cause the worst natural disaster that history has ever recorded, it needs to be remembered that A) La Palma is not El Hierro, and that B) There have been no confirmed reports of seismic activity on La Palma.

If you have 5 Minutes to spare, have a look at our favourite scaremongering conspiracy theory on Youtube (above).

Whilst being particularly fond of style guru Prof Simon Day, Tumbit blames the Illuminati.

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Op zaterdag 22 oktober 2011 00:45 schreef zenkelly het volgende:
http://www.01.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=EOSO_2011-10-21&ver=s&estacion=EOSO&Anio=2011&Mes=10&Dia=21&tipo=1
Check seismische activiteit Gran Canaria 21-10-2011...(en Fuerteventura, Lanzarote,Tenerife, LaGomera ook). En nog steeds La Palma 'out of seismische reach'.

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Op zaterdag 22 oktober 2011 09:51 schreef stan12 het volgende:

[..]

Dat is de schokgolf van de 7,9 aardbeving. Over heel de wereld is die terug te vinden. Het rare is, bij EL Hierro niet!
[ http://img695.imageshack.us/img695/6429/nieactive.gif (copy/paste deze link) ]

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Op zaterdag 22 oktober 2011 09:51 schreef stan12 het volgende:

[..]

Dat is de schokgolf van de 7,9 aardbeving. Over heel de wereld is die terug te vinden. Het rare is, bij EL Hierro niet!
[ http://img695.imageshack.us/img695/6429/nieactive.gif (copy/paste deze link) ]

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Op zondag 23 oktober 2011 08:51 schreef bwt het volgende:

[..]

Ik ben ff niet aanwezig en lees iets over een 7.9?
Waar?

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Further earthquakes and volcanic activity returns to El Hierro

The volcanic activity on the island of El Hierro has shown new signs of activity this morning, with bubbles on the surface of the ocean changing in colour.

Last night scientists also recorded around 50 new earthquakes between 24 and 16 miles deep, and with a magnitude of between 2 and 2.6 on the richter scale.

Bubbles have returned to the surface of the Las Calmas bay after appearing to decrease on Friday, with a change to their colour which may indicate a different phase in the eruptive activity. The Security General Directorate has decided that the Emergency and Rescue Group have made a number of inspection flights over the island, but are yet to make any official statement to confrm their opinion.
Earlier thsi morning the Ramon Margalef research ship from the Spanish Institute of Oceanography arrived at the island in order to take samples from the Las Calmas area and to analyse changes in the underwater volcanic activity.

Whilst the residents of the town of El Hierro are anxious that an further evacuatuion may be forced upon them, Scientists report that changes such as reported ar quite normal and to be expected in activity such as this.

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VALVERDE (EL HIERRO), 25 Oct. (EUROPA PRESS) -

A team of scientists from the Spanish Institute of Oceanography (IEO), public research body under the Ministry of Science and Innovation, has been located and mapped the outbreaks of the eruption of underwater volcano in El Hierro during the scientific mission from the past 23 October, being developed in the area on board the ship Ramon Margalef.

The scientific team, led by Juan Acosta and Francisco Sanchez, has located a newly created volcano cone-shaped, with a base diameter of 700 meters, a height of 100 meters and a crater about 120 meters wide. The base of the crater is located 300 meters deep. Also, using higher frequency echosounders has been possible to locate the columns of gases and fluids emitted by the volcano and other emission points (cracks).

The authors emphasize that the finding is the first to be achieved in these conditions throughout the world, has been investigated since the volcano and associated volcanic activity in the optimal timing of eruptive activity on the merits. This early localization and characterization of volcanic phenomenon will study the temporal evolution of these phenomena and facilitate the interpretation and understanding of volcanic phenomena on the islands.

SHIP FIRST SCIENTIFIC MISSION

Ramon Margalef The ship departed from Vigo on Tuesday October 18 en route to Tenerife, where he arrived on Saturday. On Sunday morning finally came to El Hierro. The Ramon Margalef, until a few weeks ago still in the testing phase, accelerated its set-up to lead this scientific mission, which involves its release. Its aim is to study volcanic activity in the area and its consequences in the seabed of the Canary Islands and in its ecosystem.

The ship is carrying a remote monitoring underwater vehicle called Liropus, able to observe and ecosystems sample up to 2,000 meters deep.

The oceanographic campaign in which these discoveries have been made in collaboration with the Canary Islands Oceanic Platform (Plocan) and the Canarian Agency for Research, Innovation and Information Society (ACIISI), under support of the Scientific Committee Pevolca.

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On October 23, 2011, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASAs Terra satellite captured this natural-color view of El Hierro and the North Atlantic Ocean surrounding it. A milky green plume in the water stretches 25-30 kilometers at its widest and perhaps 100 kilometers long, from a large mass near the coast to thin tendrils as it spread outs to the southwest. The plume is likely a mix of volcanic gases and a blend of crushed pumice and seafloor rock.

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Scientists now move to El Golfo because of the turbidity of the water in La Restinga
^{Thursday, October 27, 2011 7:55 acnpress}

The research vessel of the Spanish Institute of Oceanography (IEO) Ramón Margalef, Francisco Sanchez, announced the launch, on Thursday, the second phase of research will focus on imaging the coastal area of El Hierro. However, Sanchez said that due to the turbidity of the water in the area of ​​La Restinga will begin by the area of El Golfo and will continue in the current zone of the eruption when the process is restored.

The new data from the scientific campaign being carried out, since last October 23, the Ramon Margalef, on the submarine eruption of El Hierro, will do a better prognosis for the development of submarine eruption, as the member said Wednesday Scientific Committee for Civil Protection Plan for Volcanic Risk Islands (Pevolca), Joan Martí.
Researcher at the Center for Scientific Research (CSIC) and member of the Scientific Committee Pevolca, Joan Martí, the data provided by Ramon Margalef scientific campaign have confirmed that this is a fissure eruption that is located at the intersection of failure with the crack, at a depth of 200 meters, and can "emit about 40 million cubic meters of magma and even something more."
According to Martí's current data and seismic tremor level and above those provided by the scientific campaign, support the conclusion that there is a very low probability of occurrence of an eruption on the ground.

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Scientists detect that there is magma beneath El Hierro

The research vessel 'Ramon Margalef' plunge the two robots to take the first real images of cone 100 meters in the sea of las Calmas

CMM Researcher National Geographic Institute (IGN) Joan Martí said yesterday that have proven "very clearly" that magma remains under El Hierro 20 to 25 meters deep and said that the eruption is still ongoing. The researcher was speaking at a press conference within the research vessel Ramón Margalef, robots that immerses today Liropus 2000 and a photogrammetric sled to take the first real images of the eruptive fissure and cone height of 100 meters in Las Calmas.

Marti said that the eruption began in the north and the magma traveled 12 kilometers beneath the island he found out south of La Restinga. The expert noted that "the gas outlet and the seismic signal indicates that the eruption continues," and virtually ruled out a similar eruption in Frontera, where earthquakes are occurring in the last hours, but "continue to monitor." IGN investigator considered "surprising" that the volcano is behaving like a subaerial eruption, despite being underwater.

The two robots that will try today take pictures and videos of the volcano El Hierro from the vessel Ramón Margalef. This was announced by Juan Acosta, a researcher at the Spanish Institute of Oceanography (IEO). Apparently, the turbidity of the water over the mouth of the eruption, the exit of materials, will be difficult to obtain these first real images of the cone, so that scientists plan to begin in El Golfo and gradually get closer the main focus.

The Ministry of Science and Innovation released on Tuesday showed a cartographic approach, in addition to the eruptive fissure, a cone-ups, 100 meters high, with a mouth width of 120 meters, 300 meters deep. "Drawing on the bathymetry (depth map) of this area, conducted in 1998, the Navy Hydrographic Institute and the IEO, we see that in this area I had before was a valley, a valley, where there is now a cone height of 100 meters, "said Acosta.

Joan Martí recommended a new bathymetry within a time to check for changes in morphology of the building. "These structures are very unstable, as they grow, collapse, and will be watched to see what state they are," he said.

Francisco Sanchez of the IEO, added that it is fortunate to have reached a stage where the eruption is not "excessively violent" because it allowed them to pass "just above" the mouth and make the corresponding measurements.

Without oxygen

Joan Martí also revealed that the dead fish may have suffered a shock as it has been found that in the area of ​​the spot had "zero oxygen", which is called anoxia.

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El Hierro : Volcano cone has 12 Mln Cu Mt capacity

Scientists from the oceanographic research vessel 'Ramon Margalef' have completed their mapping of the seabed surrounding the volcanic eruption on El Hierro, and are prpearing to deploy their research submarine to relay images of the fissure to the surface for further analysis.


The underwater cone, which was discovered on Monday, has an estimated capacity of 12 Million cubic meters and could produce a volume of 40 Million Cubic Meters of magma, and with a flow of lava over several Km with a volume of 2 Million Cubic Meters - a significant amount given that the eruption only began on the 9th Oct.

The new cone lies some 300 meters below the surface and has a base diameter of 700 meters, a height of 100 meters and with a crater width of about 120 meters. The lava becomes solid once it comes into contact with the cool seawater, forming a crust on the surface, but remaining liquid inside, and moving slowly across the seabed until the inside of the trail eventually cools and solidifies.
The role of the reserach scientists on the surface is to gather the information and relay it to the PEVOLCA commitee and the National Geograhic Institite (IGN).

Further analysis will follow in 3 phases : the remotely operated submarine will take high resolution images of the eruption; a Sled will be used to take further images from different altitudes and angles; and finally, the water / gas colum eminating from the eruption will be analysed. The results of which are expected to be known by early next week.

An interesting post on Youtube this morning (if you have 15 mins to spare ! ) which probably explains why so many North Americans are concerned about the current situation in the Canary Islands (Tumbit Note : Notice that the clips jump between discussing predictions on both El Hierro AND La Palma) >>>

Stan Deyo- Canary Island- coast to coast 3 Nov. 2011 (clip 1 of 2)

Stan Deyo- Canary Island- coast to coast 3 Nov. 2011 (clip 2 of 2)

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A surtseyenne type eruption : What risks to El Hierro?

In addition to the volcanic tremor perpetuates an underwater eruption since 10 October 2011 to 04 17 pm Universal Time, the Instituto Nacional Geográfico - IGN - recorded from October 17 A 01 H 29 Universal Time on October 18, 2011 57 to 00 h Universal Time, 8 new seismic events in the Sea of Las Calma - including 5 in the basal zone eruption in the south-west of La Restinga, and 3 in the West - with a magnitude between 1.5 mbLg and 2.5 and hypocenter ranging between 12 and 30 km focal depth, off the coast of South-East of the island-volcano El Hierro.



On October 17, 2011, following three earthquakes of magnitude greater than 2.0 mbLg:
- The first 07 to 07 h Universal Time, latitude and longitude 27.6873 ° N 18.0374 ° W, 13 km deep hypocenter, magnitude mbLg 2.1;
- The second 55 to 12 h Universal Time, latitude and longitude 27.6645 ° N 18.0448 °, west 16 km deep hypocenter, magnitude mbLg 2.5;
- The third 12 to 18 h Universal Time, latitude and longitude 27.6629 ° N 18.0758 ° W, 18 km deep hypocenter, magnitude mbLg 2.2;
the spectrogram, a major significant change in the volcanic tremor and, consequently, in the eruptive process, has suddenly packed 12 to 19 hours Universal Time.





Two theories can be made:
- A new eruptive vent opened, within the perimeter defined by five seismic hazard cited above, between 150 and 300 meters deep, on the northwest flank of the volcano underwater peaked at 4 / 5 km southwest of La Restinga to -370 meters;
- The volcanic cone of the vent had appeared off the coast of Puerto Naos, 150 meters deep, is close to the ocean level.

In the first case, clear signs, in a few hours, will confirm or deny. But if a new fissure has really opened the first signs that indicate, will be on the one hand, a gradual decrease of volcanic tremor accompanied by a deflation of the ground - no doubt, then, that some scientists interpret it, not as the opening of a new vent, but the underwater volcanic eruption gradually draws to a close, unless a temporary lull, it was nevertheless not be excluded if périclitent volcanic swarms - and, secondly, the gradual disappearance of the hot spot and the resurgence of progressive giant bubbles become less frequent over time.

In the second, the vent was opened to very shallow - 150 meters - the magma flows, pillow lavas forming, it could be no doubt that the volcanic edifice is being built near reaching the surface. Since October 16, giant gas bubbles occur every 15 minutes, overlooking the eruption site. These were the beginnings of a hot spot visible from Puerto Naos and Punta de la Restinga. And high boiling points out that the top part of the new building is sub-flush and the appearance of a plume cyprissoîde, surtseyenne herald an eruption could be imminent.

What risks as part of an eruption surtseyenne?

Surtseyenne type eruption is a type of volcanic eruption that occurs in shallow seas or lakes within 100 meters. It was observed for the first time, Capelinhos, the Azores, from 1957 to 1958, but the emergence of Surtsey, south of Iceland between 1963 and 1967, which gave it its name. These eruptions are eruptions hydromagmatic interacting with violent explosions, more violent than if they occurred on land, caused by andesitic or basaltic magma at a temperature of 1200 ° C, in contact with the shallow water environment or surface water, frequently less than 20 ° C. Water expands and turns into steam, and in contact with the magma, its expansion releases energy that quenches and shatters. It explodes and creates plumes of ash, steam and slag.



The explosive expansion of steam occurs near the surface in an open vent where water pressures and temperatures are relatively low, and where energy can be dispersed during eruptions of variable intensity , repeated at intervals of several minutes that can last many months. Explosions superficial provoquenr collapse of walls at the top of the vent pipe and developing a funnel-shaped

The activity builds hydromagmatic téphraïques surfaces of several square kilometers in the first few months. When the sea water can no longer reach the eruptive vent and lava, the eruption becomes Hawaiian or Strombolian type. The explosions and offshore create plumes of ash and steam that rise to over 4 / 5 kilometers, or 8 to 10 km altitude, and clouds of several hundred meters high of tephra. It results in the formation of tuff rings and pyroclastic cones.

While the surtseyennes eruption generate spectacular explosions that are much less dangerous than leaving to assume their appearance. The coasts of the Atlantic Ocean recellent many cones surtseyens such as Monte Brasil in Terceira, and Monte Guia, Faial, Azores, El Golfo, Lanzarote, and Taco, in Tenerife, Canary Islands ...

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27/10/2011 @ 16:36 So far today there have been 26 earthquakes on El Hierro measuring over 1.5° on the Richter scale, two of them have been over 3° at 06:27 and 14:02.

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28/10/2011 @ 09:19 – New 3D video released by the Ministerio de Ciencia e Innovación showing shape and form of the underwater volcano on El Hierro.

Recreación 3D volcán El Hierro

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El Hierro update : Sat 29th October

Seismic activity on the Island of El Hierro intensified yesterday, with a total of 63 earthquakes being recorded by the National Geographic Institute (IGN), with an average depth of 20km and magnitudes of up to 3.3 on the richter scale, off the North-West coast of the Island.

Of the 63 quakes, 4 were recorded above 3.0, 27 between 2.0 and 3.0 with the remainder being below 2.0.

Over the past week dozens of similar quakes have been recorded in the same area - the opposite side of the Island to where the volcanoi eruption is being observed off the coast of La Restinga.
So far today the IGN has recorded 32 earthquakes, mainly around the El Golfo area, with the largest one being recorded this morning with a 3.3 magnitude.

The movements could indicate a likely change in magma flows deep underground, but scientists are still unable to say if this will result in a change of eruptive phase to the existing underwater volcano, or if a further eruption may occur.

Thel Ramon Margalef Oceanographic research ship is continuing to monitor the situation and has surveyed the underwater eruption off the south coast of the island tocheck for any changes in activity. A new Volcanic crater was discovered earlier this week 300mt below the surface measuring some 100mt high, with a cone diameter of 700mt and a crater width of 120mt. Geologists estimate that it has a cubic capacity of 12 Million Meters and could potentially produce as much as 40 Million cubic meters of magma.

Underwater lave flows have now reached 7km - the magma solidifies on the outside as it comes into contact with the cold seawater, but remains liquid and continues to flow at it's core.

Erruption El Hierro submarine volcano

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The current tremor data now suggests that a new vent or vents have opened or are about to open up just outside north-west coast of El Hierro volcano. The depth where the main earthquakes have been taking place is about 100 to 300 meters (but might be more). So far the largest earthquakes to take place in this area was a ML3.9 with the depth of 22 km. What is important in this is not the fact that the earthquakes are at great depth. But also the fact that a more shallow might not take place. As that was not the case when the eruption started in El Hierro on 10 October, 2011. It is unlikely that there is going to be any shallow earthquake activity before a new eruption vents opens up. As that was not the case on the 10 October, 2011 from what I can remember.

I am not sure how strong earthquake this area can make. But I am guessing that it might well be in the upper Mb5.5+ range. The earthquakes that are now taking place are due to magma injection. Not a tectonic one. There is a difference between the two. But this rifting in El Hierro might trigger a earthquake close to El Hierro Island in near future, that earthquake would be a tectonic one. Not a earthquake created by magma movements.

So far the new vents are still unconfirmed. But there are signs in the harmonic tremor data that new eruption vents might be opening up or have already opened up. But at this moment I am waiting for a confirmation on this actually taking place. That is going to take a few hours, given the experience so far.

SPOILER

Om spoilers te kunnen lezen moet je zijn ingelogd. Je moet je daarvoor eerst gratis Registreren. Ook kun je spoilers niet lezen als je een ban hebt.

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31/10/2011 @ 09:36 – Over the weekend there were 148 earthquakes detected on the Island of El Hierro (from 00:01 on Saturday morning to 23:59 on Sunday night), there were 59 on Saturday, the highest one registered reached 3.6 on the Richter scale and four of these were felt by the population. Yesterday, Sunday 20th October 2011, there were 89 quakes detected, two of which reached a magnitude of 3.9 o nthe Richter scale and 7 of these were felt by the population.

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PEVOLVCA Scientists on El Hierro call meeting for this morning

The PEVOLCA Committee on the Island of El Hierro is meeting again this morning to review the current situation on the Island following an increase in seismic activity over the weekend, and to evaluate the information, which has sometimes been conflicting. The Committee took the decision not to take any action yesterday, but instead to wait for a more revue of analysis and meeting today.

The total count of seismic activities is difficult to keep accurate due to their frequencies, however, yesterday there were 93 recorded earthquakes, with a further 41 already being recorded before 09.00 Hrs GMT this morning.

In addition to the frequency of activity, the intensity appears to growing with 2 quakes measuring greater than 2.0 on the richter scale alone this morning.
Doubts have once again been raised about the safety of the Los Roquillos tunnel, which could hinder any attempts to evacuate the residents of the El Golfo area to the main town of Valverde to the North-East of the Island.

More news is expected later in the days once the details discussed in the meeting have been released.

This morning's Youtube clip shows a 3D graphical representation of the seismic activity that has occurred underneath the island between the 10th-30th October

El Hierro Quakes 10 - 30 Oct.swf

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Second eruption imminent

Scientists analysing seismic activity on the Island of El Hierro have warned how a second volcanic eruption could be on the point of happening.

Even though scientists last week spoke of signs of the first eruption off the south coast of the island, decreasing in activity early last week. seismic activity off the opposite coast of the Island led to fears that the eruprion may simply be about to enter a new phase. Over 150 earthquakes were recorded over the course of this weekend around the areas of Frontera and El Golfo, reaching as high as 3.0 on the richter scale.

It is thought that this activity could signal that the magma is now trying to break through to the surface on the opposite side of the island.
No changes to the state of alert have been made - the Island as a whole remains on Yellow alert, with the town of La Restinga, close to the Volcanic eruption on the south coast, remaining on red alert. It has also been rumoured that the El Golfo area may also be moved up to red alert, and the Los Roquillos tunnel closed if earthquakes continue.

A senior Volcanologist, Nemesio Perez, explained to Spain's national broadcaster RTVE "What we do know is that there is activity with magma and this chapter has still not been closed," he said.

The PEVOLCA spokeswoman, Ana Vidal, confirmed the news and referred to the activity as being "great and accelerating."

Although it is a couple of days old now, this Youtube clip shows a good graphical demonstration of what may be happening or about to happen >>

The PEVOLCA committee met this morning to discuss the events of this weekend, but it was found that there is insufficient data to predict what will happen in the coming days, weeks or months.

Alert : El Hierro Might be Getting Ready To Blow! Canary Islands : October 29, 2011 12:30 AM CDT

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31/10/2011 @ 19:29 The El Hierro underwater volcano eruption appears to again be active as magma has been reappearing on the surface of the water off the coast of La Restinga. Residents have said that the sea surface appears much darker.

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Op woensdag 2 november 2011 08:44 schreef bwt het volgende:
De foto van een eruptie in het noorden van El Hierro bleken dus meer gezichts bedrog dan werkelijkheid.
Maar de onderwater video beelden van de zuidkant zijn echter.

Video Robot Submarino

Bezig nachtje geweest.
Meer dan 69 bevingen - meesten tussen de 2 en 3 in magnitude

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02/11/2011 @ 08:00 There has been a 4° earthquake detected this morning to the north coast of El Hierro as the government prepare for a new eruption. Additional military personnel and materials such as shelters (for a capacity of 2.000 people) has been sent to the island of El Hierro as experts predict a new eruption on or near the coast of El Hierro after a similar pattern follows the last one. This morning at 07:54 there has been a new earthquake measuring 4° on the Richter scale detected to the north coast of the island. It was felt by the population.

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Update 02/11 11:09 UTC :
- IGN had listed 2 shallower earthquakes, 1 at 1 km depth (south of El Pinar) and 1 at 3 km depth nw of Frontera .
- both quakes have been recalculated and revised / deleted (instrumental errors are common in earthquake measuring)

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The General Directorate of Security and Emergency of the Canarian Government scientists confirmed that Pevolca (Civil Protection Plan for Volcanic Risk) move this morning at El Golfo, Border, El Hierro, was detected after an increase of seismicity in the last hours.

During the visit, assess the situation of eruptive phenomena and the state of neighbors. Throughout the day they decide whether to take further measures of civil protection for citizens.
So far the situation "has not changed" is "quiet," said a regional government spokesman, and no new decisions have been taken because "there are no significant changes or a substantial difference" with respect to previous days.
The National Geographic Institute (IGN) detected at 7:54 pm in the La Frontera an earthquake of magnitude four, according to an initial assessment, which would be the most important seismic crisis detected in this area living on the island of El Iron this summer.
This earthquake was detected at 20 km depth, according to the same source was felt by the population.
Overnight and early morning hours IGN recorded more than 40 earthquakes, although none as important as this morning.

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A professor argues that Barcelona "has underestimated" the Explosive material

The pyroclastic found in waters of La Restinga provide "clear evidence" of an explosive "big" so far "not mentioned publicly by anyone." This is to a report, prepared by Professor of Petrology and Geochemistry, University of Barcelona, ​​Sunday Gimeno, who believes that "it has underestimated the explosive material."

According to The El Hierro Journal contains, the material analyzed,''does not present the characteristics of a surtseyano like eruption, "which is, according to this expert defends the scenario" repeatedly proposed by the scientific monitoring committee.''
In his view, since the surface began to appear in the pyroclasts, the commission "should be understood that it was explosive submarine eruption and a different kind" and that if, moreover, implied magma mixing was "potentially much more dangerous rhyolitic magma involved and if, further, "Gimeno said. Therefore, in its report argues that the pyroclastics," can, and should be analyzed in a matter of hours "for what is being asked the reason for many days "still did not know what they are."
The study of pyroclastic, by the doctor at the request of the City of El Pinar, indicates that magma mixing different compositions is a phenomenon widely reported in the literature as "increasing the explosiveness of magma and, in many cases as a trigger for an explosion, "he explains. Therefore, for this professor of the University of Barcelona, ​​have been mapped throughout a volcanic hypothesis surtseyano" trivializing its potential explosiveness. "
In fact, after Chemical analysis of the material found in the area, notes that, once classified by the TAS diagram (Total-alkali versus silica) of the International Union of Geosciences (IUGS), which is the internationally accepted usage The black product is a basic rock (basanite) and White, a differentiated product (alkaline rhyolite).
The first product was already known in other samples from the island of El Hierro from previous eruptions, while the second is "comparable but not identical, to what is known in other eruptions are less frequent in El Hierro (slightly richer silica), "in the report.
The expert would be advisable to perform a systematic sampling and characterization of pyroclasts that are being expelled by the volcano, as the compositional characteristics and the degree of crystallinity can vary during the eruption and "the evolution of this condition, so this task is useful in the face of crisis management, "he advises.
Also, the professor says in his report that the determination of chemism, which is what can be explained by natural phenomena in accordance with the laws of chemistry, and the degree of crystallinity of the rocks formed during an eruption, "should be done as soon as possible in the course of this, as both factors definitely affect the explosive and therefore the associated volcanic hazard."
Although, according to this expert advocates, many of the Spanish public universities and different centers of the Center for Scientific Research (CSIC) have equipment and technical staff "well qualified", in his opinion, "can not understand how this characterization not carried out since the first time by the commission or commissioning scientific monitoring of the eruption, "he concludes.

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Op woensdag 2 november 2011 16:19 schreef bwt het volgende:

[..]

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Op woensdag 2 november 2011 16:27 schreef bwt het volgende:
Mijn gok:

Een vergelijkbare uitbarsting als in het zuiden van het eiland. Maar dan dichter bij de kust en een tikkie zwaarder. Ik gok dat we meer borrelend bruin water gaan zien.
Geen grote explosie aangezien het onderwater plaats vind.

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Op woensdag 2 november 2011 17:04 schreef bwt het volgende:
Daar zat ik me eerder ook al over te brainstormen.
Maar kon geen echte reden vinden om het te posten.

^{(hoe kom je trouwens bij deze plaatjes?)}

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Op woensdag 2 november 2011 23:22 schreef Takkembah het volgende:
Weet iemand wat teideano nu op Twitter roept? Tis spaans en zit op toon dus kennie vertalen.....

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en weer ..... nog een goede maar goed wiebelen.