El Hierro

[jand]

Update 07/02 – 19:30 UTC
 ER reader Julian writes in our comment section : In an interview with Ramon Ortiz (Volcanologist of CSIC) in local newspaper Canarias7, Mr. Ortiz says that according to past experiences, the eruptive process is finishing. The new HT increase of the last couple of days are the normal evolution to a new phase.
 He says that two different possibilities are: 1- that this process ends in few days and/or a new eruption is going on in another location.
 He says that right now there are two different eruptions. The one in Las Calmas, and another one elsewhere which we may never know where it is, beacuse of the depth in the north area.

Update 07/02 – 17:56 UTC
 - A CAP scientists who met Joke in El Pinar a few hours ago said to her that he has seen an extraordinary jacuzzi around noon UTC today. He was quiet fascinated about it.
 - We are also fascinated about the strange harmonic tremor we see today. A lot of powerful starts gradually winding down, again and again. Now it is calm again, but we cannot remind having seen the same pattern since a long time. It may be very wise to follow HT the following hours in combination with the webcam

[jand]

http://212.170.244.196/

Boat on the stain at the moment.

[jand]

OT but picture of Etna tonight.

https://picasaweb.google.com/110366256140084081552/Etna7DeFevereiroDe2012#5706494911433110370

[jand]

KarenZ says:

 February 7, 2012 at 23:12


But take a look at HI02:

http://www.ign.es/ign/resources/volcanologia/html/deformacion.html

Reply


Carl le Strange says:

 February 7, 2012 at 23:18


Note that H101 is moving away from H102 & H104... Inflation, and very probably such since it affects 3 stations. Also substantiated by Nagoyas data (Oops, now Perez at Involcan got angry).

Reply

[jand]

Bobbi says:

 February 8, 2012 at 00:23


07/02/2012 22:25 Depth 10 km M 1.2 S EL PINAR
 27.5455 -18.0210

Very interesting location. Registered on CHIE. See ER for link to google earth location.

Reply

[jand]

No sé si tendrá algo que ver o no, pero me he fijado que las profundidades de los terremotos en el centro de la isla han pasado de 15 KM a 10.
 ¿Está subiendo el magma o los gases?.

I don't know if you have something to do or not, but I I have noticed that the depths of earthquakes in the center of the island have gone from 15 KM to 10.
 Is it rising magma and gases?. (Translated by Bing)

[jand]

Carlos says:

 February 8, 2012 at 09:26


Too many vertical lines at the last hour.
 The low level of noise at CHIE spectrogram shows us pressures is inside.
 Not take long time to have something new.
 Or larger seismic activity or the reestablishment of the eruption.

http://www.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CHIE_2012-02-08_07-08&estacion=CHIE&Anio=2012&Mes=02&Dia=08&tipo=2&hora=07-08

[jand]

Update 08/02 – 10:21 UTC
 - Very minor harmonic tremor all night and morning so far, a little increase in HT at 03:05 for about an hour.
 - Jacuzzi activity was very much present all night long in a very sensitive webcam seting. We enjoy this setting for maximum observation at night.
 - 5 earthquakes so far today!
 08/02/2012    00:42      Depth 14 km        M 1.3    W EL PINAR
 08/02/2012    00:43      Depth 12 km        M 1.3    SW FRONTERA
 08/02/2012    02:52      Depth 11 km        M 1.4    W EL PINAR
 08/02/2012    06:12      Depth 14 km        M 0.8    SW EL PINAR
 08/02/2012    07:33      Depth 20 km        M 1.4    SW EL PINAR

[jand]

http://www.ign.es/ign/resources/volcanologia/html/deformacion.html

Some has said there is a 10mm rise in the deformation of El Hierro.

Is this quite a big jump recently and could someone please explain what actually this could mean eventually could happen?

Reply

Carl le Strange says:

 February 8, 2012 at 14:03

It is a sign that there has been more magma arriving then has been ejected, and that the internal pressure of El Hierro is growing again. Most likely this will keap Bob going for at least 2 more weeks.
 Up untill now there has not been a lot of inflation or deflation, it has kind of been at an equilibrium.
 What though is a bit odd is that there is no harmonic tremoring to speak of, so unless it increases the pressure will most likely just continue to build up. Then we will have an increase in quakes, and sooner or later a possible new vent opening somewhere.

Reply


Peter Cobbold says:

 February 8, 2012 at 14:05

So far it looks like a repeat fo a GPS motion in early January:
 http://www.ign.es/ign/resources/volcanologia/jpg/ELHIERRO_GPS_FRON-IZAN.jpg
 Frontera has moved 10mm NE.
 Dont know about elevation.- need Nagoya data for that.

[jand]

Avcan FB Copied and Translated.

Waiting for the next move of the volcano, so as I am, the moment the tremor is weaker, almost zero, but this.... the better try the smoky pyroclastic this afternoon. Seismicity is still there, with a deep earthquake which seems to indicate entry of Magma and the epicentres all located in alignment NNW-SSE, the last two in the Gulf area.(Henry)


EARTHQUAKES DAY 08 FEB. -Red (9)
EARTHQUAKES DAY 07 FEB. -Orange (10)
EARTHQUAKES DAY 06 FEB. -Blue course (11)


If someone has looked at in the deformation of the IGN page, it will have been noted that the last two measures indicate something... it is early to say anything, yet are interim measures, but seems stations reflect data that are changing... to see that stays too...


http://www.ign.es/IGN/resources/volcanologia/HTML/deformacion.html

[jand]

volcano cafe

1125421 09/02/2012 03:38:09 28.2641 -16.3108 25 2.4 4 SE GÜÍMAR.ITF

This is interesting its exactly in the same position as the one last week between Tenerife and Gran Canaria but looks to be nearer the coast line ?

[jand]

And in the graph of evolution of energy seismic accumulated released continues its trend upward with these last meneitos... seems a line with more aware that tapeworm before, then means that the system is releasing more energy...(Henry). http://www.avcan.org/sismica/graficas/G806.jpg?t=1328735067


http://www.avcan.org/sismica/graficas/G806.jpg?t=1328735067
www.avcan.org

[jand]

Update 08/02 – 23:26 UTC
 Just a small note to let you know that Etna is still erupting – these eruptions (paroxysmal eruptive episodes) are lasting normally only a couple of hours. If you haven't seen it, be quick or you may be to late to see it in real-time.   Se link at the 21:11 update.

Update 08/02 – 23:18 UTC
 Remember our update from 17:56 yesterday, when somebody of CAP told Joke that he had seen much stronger activity than usual in the Jacuzzi. ER reader Sissel has recorded the webcam at that time. The 4 minutes video shows the more intense activity. The activity occurred when we lived through 5 minutes of the most powerful HT since many days. The graph can  be seen at the end of the recording.

http://www.youtube.com/watch?v=P5n9gE2uYTs&feature=player_embedded

[jand]

Carl le Strange says:

 February 9, 2012 at 08:19


A small point, nothing to get worried about yet.
 But, it seems that Bob has taken a nap. The harmonic tremors are rather gone, and the visible signs of her is also declining.
 But, according to Nagoya and IGN GPS reading we have inflation again, the 0,59Hz is going full swing, and we have an increase in earthquakes.
 This leads me to believe that Bob is clogged up for the time being causing an internal pressure buildup in the magma chamber(s) under Tanganasoga.

If this continues for a while, the likelyhood of a new eruption site opening up increases. Depending on where the perhaps blockage of Bobs feeder tube has happened, it could either be a new fissure opening up upstream, probably onland. Or it might lead to an eruption at the Tanganasoga central volcano, or somewhere along the Tinganar fissure. The longer it takes before something happens, the more likely the Tanganasoga option becomes, I think.
 If it is Tanganasoga that erupts, then I would expect it to look like Etna did yesterday with firecurtains, lava bombs and slow moving lava floods. Not very dangerous as long as you stay out of the bomb zone.

Reply



Carlos says:

 February 9, 2012 at 08:23


El Hierro, pending another eruption

The island supports a new volcanic reactivation process

Life | 09/02/2012 – 00:44 pm

Silvia Fernandez

Valverde (El Hierro)

Nearly four months after the volcano erupted El Hierro in the Sea of #8203;#8203;Calm, two kilometers from the coast of La Restinga and still active, the Canary island is experiencing a new volcanic reactivation process could end up with a new eruptive locus. This was noted by the expert and scientific volcanism of the Higher Council for Scientific Research (CSIC) Ramon Ortiz, who says that since mid-January the evolution of earthquakes does not fit into a "relaxation model" system, but a revival , which is on the rise.

Ramon Ortiz rejects the theory of how the National Geographic Institute (IGN) that attribute earthquakes to tectonic readjustment after the eruption. "Until Christmas, seismicity, which dropped a lot, was adjusted to a relaxation model and assumed that the process could be ending. However, since the earthquake three weeks ago have started to grow. It does not conform to a model of relaxation , but is picking up and follows the same pattern as in July, when the process began-volcanic, "says this expert in forecasting methods eruptions. And the data is on this line. Every day, from the middle of last January, are occurring between 11 and 15 earthquakes per day, with magnitudes ranging between 0.6 and 3.2 degrees on the Richter scale, both north and south of the island. Since the weekend has felt at least one every day. In addition, the deformation of the island of El Hierro remains high, five millimeters. And gas emissions have grown back. "Clearly, the party continues," said Ortiz.

In his view, the island of Meridian is currently in third phase of the volcanic process. And that is to Ortiz, El Hierro and two eruptions have occurred since the phenomenon began on 17 July. One is in La Restinga, which began in July and ended on October 10 with the opening of an eruptive mouth of Calm sea, and is still active but likely will close its operation in the coming days, and another in the north, at sea, 3,000 miles deep and is aware that only the signals recorded by the system. This second cycle, according to this scientist, began in October, when they again began to register large magnitude earthquakes, and ended between 4 and 11 November with another eruptive mouth and little material out of water pressure. "We are now in a third cycle, which may not come to anything or that would lead to another eruption, which may be on land or at sea, nor see," he explains.

In the Canary Islands, there are documented cases of eruptions in phases, such as the Timanfaya in Lanzarote (in 1730), which lasted six years with various breaks and various emission sources. Similarly, in Tenerife is no record of three eruptions in the same year.

For Ortiz, the time depends on the amount of magma that is trying to come to the surface and in the case of El Hierro, is very high. The CSIC is estimated that under the island had a cubic kilometer-stone almost 500 kilos per inhabitant of the planet-of magma, which can be reduced to 800 million cubic meters thanks to the material outlet at the mouth of La Restinga. "It does not get everything, but it is clear that here there is a large intrusion of magma, of course, not walking 30 kilometers from north to south to exit a small outbreak in La Restinga" says this expert .

The El Hierro volcanic process must be seen not in isolation, but a series of interrelated changes of condition that have occurred in the Mid-Atlantic and giving rise to increased activity in the Atlantic, both volcanoes as earthquakes. The cord that runs from the North Pole to the meridian 55 South, where it joins the Antarctic plate, has entered a "decompression phase" which allows for greater output of lava and plate motions. The result of this are the repeated eruptions that are taking place in Iceland (up to two or three a year) and the rise of seismic activity in the south of the Peninsula (Lorca earthquake), North Africa, the islands Azores, and even the U.S. East Coast, plus the volcanic activity in West Africa.

Ortiz explains, was in 2000 when the CSIC realized that "something had changed" in the Canary Islands. Then there was abnormal activity within the island of Tenerife was the subject of several research projects and was followed in 2004, the seismic crisis of Teide, which, says Ortiz, "fortunately did not result in eruption" . "Everything is in the same context. For example, when the process of El Hierro volcanic seismicity disappeared in the other islands. Focus more active between Tenerife and Gran Canaria disappeared. And what happened then? Well, there was a earthquake in the U.S. Atlantic coast and the very next day, there was an earthquake felt in Gran Canaria. And the next day starts again the activity between Gran Canaria and Tenerife, "he explains.

He recalls that the last time you entered the Atlantic Ridge "decompression" and therefore recorded increased activity was in the eighteenth century. Then the volcano erupted Laki in Iceland in 1783, triggered the French Revolution. His ashes destroyed all the crops, causing a famine that led to social unrest.

http://www.lavanguardia.com/vida/20120209/54251293779/el-hierro-pendientes-de-otra-erupcion.html

Reply


Carl le Strange says:

 February 9, 2012 at 08:33


Finally someone who has a clue really.
 This is the same thing basically that we have said for a long time now. Except that I am not really buying into the northern eruption theory before someone finds the vent.

I get the distinct feeling that he has been talking to his Icelandic collegues who issued a warning a year ago regarding the rifting phase of the MAR and its effect on Iceland. His wording is almost exactly the same as IMOs.

Reply

[jand]

Gps Nagoya.
 Sabinosa.
 http://www.seis.nagoya-u.ac.jp/sagiya/canary_gps/SABI.pdf

Today´s seismic activity with EQs at 3 and 6 km depth.
 1125421 09/02/2012 03:38:09 28.2694 -16.3194 26 2.3 4 SE GÜÍMAR.ITF

• info

1125492 09/02/2012 07:46:18 27.7448 -18.0377 10 0.9 4 SW FRONTERA.IHI

• info

1125494 09/02/2012 07:52:02 27.8067 -18.0420 1.1 4 NW FRONTERA.IHI

• info

1125496 09/02/2012 08:12:51 27.7512 -18.0414 depth 3 1.2 4 W FRONTERA.IHI

• info

1125517 09/02/2012 08:46:16 27.7170 -18.0623 depth 6 1.2 4 SW FRONTERA.IHI

• info

Reply



criseh says:

 February 9, 2012 at 10:15


09/02/2012 07:46:18 27.7448 -18.0377 10.4 0.9 mbLg SW FRONTERA.IHI - El Hierro
 09/02/2012 07:52:02 27.8067 -18.0420 1.1 mbLg NW FRONTERA.IHI - El Hierro
 09/02/2012 08:12:51 27.7512 -18.0414 2.9 1.2 mbLg W FRONTERA.IHI - El Hierro
 09/02/2012 08:46:16 27.7170 -18.0623 6.4 1.2 mbLg SW FRONTERA.IHI - El Hierro

they go from N to S in a line...and from deep to surface

Reply

[jand]

criseh says:

 February 9, 2012 at 10:22


http://www.avcan.org/index.php?m=AVCANmaps&a=catMedida&f1=01/01/2011&f2=09/02/2012&m1=0&m2=9&p1=0&p2=2&s=2&z=&e=0

the shallow seismic movements.... it might be seen the area of Bob, nice circle and also a spot near the coast...Bob's unborn brother???

Reply



Kiese We says:

 February 9, 2012 at 10:23


If I have understood correctly, the scientists think that the activity in the Atlantic ridge also backs with the activities at El Hierro have to do? So, the seismic activity of yesterday/the day before yesterday on the reykjavik Ridge the process on the Canary Islands back in gear?

[jand]

As to what occurs or can occur, if we have very shallow seismicity at one point, it may indicate the next eruptive mouth, and magma is moving towards the surface, which is why you need to monitor this area of Charco Azul to see if there are more shallow activity.


So at this step, I bring you the FB fund something that I said, already many days ago, specifically on January 12 of this year made me this question on this same FB (Henry).


QUESTION: "Henry, do you have a rough idea, with the assumption that you are considering, what other part of the island can arise another mouth?." Thanks in advance, if you have a little time to answer. "Greetings".


The answer was and is the same I give today, serves as the things are still equal


ANSWER: "the truth is that it is difficult to think a particular site but the rift on the basis of seismicity that we have had since started swarms, continuing along the coast of Restinga towards the NNW towards Cala Pinar and hence has two branches:"


"One NW-SW under the mar de las calmas towards the lighthouse of Orchilla, in whose sensor note lot microsismicidad and could be a point of emission and from there short in the direction n-S area to Sabinosa peaks to the West of the Tanganasoga and the own Tanganasoga."


"The other more straight NNW-SSE branch seems to go deeper and East through almost below la Restinga, the entire coast and dorsal to the Julan and the area of peaks to cross to the Valley from the Gulf to the East of the Tanganasoga by a failure of NNW - SSE through the llanillos and House of Elsa and ends in the blue pond"", another point near border also could be candidate for eruptive zone"


"So we would have the following points from more to less likely I think that they may be possible eruptive mouths if the phenomenon extends far in time:"


-Next to the coast to the West of la Restinga
-Area of cala Pinar
-Near of Orchilla and the Julan coast


-Area of Charco Azul
-Area of the Llanillos
-Area of Sabinosa


-Area of peaks and East of Tanganasoga.
-Area of summits and oesteTanganasoga and the Tanganasoga Summit.

I hope that the hypothesis you are helpful (Henry)"
about an hour ago · Like · 12

[jand]

Avcan FB Copied and Translated.

With the threat of another eruption!... I do not see in the media, institutions and society of the Islands in general, the awareness that we are probably experiencing something unusual in the history of the Canary Islands, whose evolution and consequences today are unpredictable. Only the most ardent of these scientific and environmental issues, either by profession or mere fondness, Amen herreña population as it affected actors, continue daily news with genuine concern and eager to know more about the evolution of events, and we know what is happening through the work of forums like this AVCAN... And pardon me this stuff I've released simply wanted to express my gratitude to the Organization for the great informative work you do! (Translated

[jand]

Avcan

map of seismicity in recent days, today have had first thing in the morning two earthquakes in the area of the blue pond, in the center of the Gulf Coast, one of them very shallow and one without depth so you need to keep an eye on this area and another in the area of summits to 6.4 km to the South of the Tanganasoga. There was also one in the sea of the Gulf in the direction N of Charco Azul. Yesterday late earthquakes were north - northwest of the Tanganasoga on the coast line and it also focused on the area of summits in the area of the Tanganasoga, the Julan and the mar de las Calmas. Remarkable that deep earthquake in the area of Cala Pinar may indicate again provide magma from the depths to the system. (Henry)
3 hours ago · Like · 6

[jand]

New earthquakes detected and localized yesterday and today by the IGN in the area of the island of El Hierro and vicinity since the last information note AVCAN:


1125362 08/02/2012 15: 35: 09 27.6555 - 18.0182 11.8 2.2 mbLg SW EL PINAR.IHI
1125363 08/02/2012 18: 38: 18 27.6996 - 18.0375 13.6 1.3 mbLg W EL PINAR.IHI 12170


1125364 08/02/2012 18: 51: 57 27.7420 - 18.0767 12.3 1.3 mbLg W border.IHI
1125365 08/02/2012 19: 18: 04 27.7480 - 18.0695 12.1 1.3 mbLg W border.IHI


1125492 09/02/2012 07: 46: 18 27.7448 - 18.0377 10.4 0.9 mbLg SW border.IHI
1125494 09/02/2012 07: 52: 02 27.8067 - 18.0420 1.1 mbLg NW frontier.IHI
1125496 09/02/2012 08: 12: 51 27.7512 - 18.0414 2.9 1.2 mbLg W border.IHI


1125517 09/02/2012 08: 46: 16 27.7170 - 18.0623 6.4 1.2 mbLg SW border.IHI
3 hours ago · Like · 3

[jand]

Highlight that they have updated the IGN felt where some events of other previous days were not catalogued as senses, thanks to all who filled the parties (Henry):


Event 1125264 08/02/2012 07: 33: 12 27.6461 - 18.0396 20.5 II 1.4 mbLg SW EL PINAR.IHI


Man:II Gulf (the) border.TF


Event 1125145 06/02/2012 15: 45: 06 27.6997 - 18.0613 11.9 III 2.6 mbLg W EL PINAR.IHI


Man:III LLANILLOS. THE, BORDER.TF
Man:III TIGADAY, border.TF
Man:II border.TF
Man:II Gulf (the) border.TF


Event 1124984 05/02/2012 12: 05: 05 27.7000 - 18.0503 12.8 II 1.8 mbLg W EL PINAR.IHI - iron


Man: I - II LLANILLOS. THE, BORDER.TF


Event 1124905 04/02/2012 16: 48: 01 27.7106 - 18.0391 11.8 II 2.1 mbLg W EL PINAR.IHI - iron


Man: I - II houses. THEM, THE PINE OF THE IRON.TF
3 hours ago · Like · 11

[jand]

viva says:

 February 9, 2012 at 20:10


I found some awesome digital pics that show the cliff of pinar and the fracture running right thru the ridge, showing on the shoreline all the way to the waves! Halfway down the page under the heading: El Hierro island (photorealistic) by Cestomano
 http://xplane10.wordpress.com/2012/02/09/review-egsy-sheffield-city-airport-el-hierro/

Reply

[jand]

Another earthquake between Fuerteventura and Lanzarote.

[jand]

1125608 09/02/2012 20:10:47 28.8884 -14.5801 13 2.2 4 ATLÁNTICO-CANARIAS

[jand]

KarenZ says:

 February 9, 2012 at 21:28


2.2 mbLg and it only really shows on CFUE:

http://www.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CFUE_2012-02-09_20-21&estacion=CFUE&Anio=2012&Mes=02&Dia=09&tipo=2&hora=20-21

Reply

[jand]

[jand]

Yesterday besides the earthquake in the Atlantic next to Fue and Lanzarote there also was an earthquake in the Atlantic near to the east coast of Tenerife .

Interesting to see there has been another one this morning off the east coast of Tenerife close to the one that happened yesterday.

Carlos says:

 February 10, 2012 at 06:38


1125671 10/02/2012 01:56:08 27.6637 -18.0784 12depth 1.5 4 SW EL PINAR.IHI

• info

1125672 10/02/2012 03:10:23 28.1983 -16.2768 1.8 4 ATLÁNTICO-CANARIAS

• info

1125674 10/02/2012 04:55:30 27.6516 -18.0536 3depth 1.2 4 SW EL PINAR.IH

[jand]

Journey to the centre of the earth.

This video is very interesting it is in Spanish but can be followed by the pictures and footage shown.

http://tu.tv/videos/viaje-al-centro-de-la-tierra

[jand]

The 2.2 that happened yesterday off the coast of Fuerteventura was around the same position as the 3.5 that happened in January.


120245 05/01/2012 17:05:58 29.1047 -14.2260 11 Sentido 3.5 4 ATLÁNTICO-CANARIAS

Volcanocafe comment re the earthquake yesterday.

KarenZ says:

 February 9, 2012 at 22:59

Thank you. Again in the region of the ocean crust. Checked out Google Maps. There seems to be a small trench or ridge there:

http://oi43.tinypic.com/1zmcaiu.jpg

Suspect that EQs are not uncommon there. But I need one of the experts to check; it is outside the area I selected to plot EQs.

[jand]

Avcan

And another 1.8 with yesterday in Tenerife, in the area submerged by such Güímar and as happened in January... (Henry)

1125672 10/02/2012 03: 10: 23 28.1983 - 16.2768 1.8 4 ATLÁNTICO-CANARIAS