Tirelessly updating Avalon on the El Hierro eruption.

[Hervé]

IGN map which plots the epicenter of this earthquake of 4.4 magnitude

SPECIAL SEISMIC CRISIS - 11/02/2011 (18:53 pm)
TWO EARTHQUAKES OF MORE THAN 4 DEGREES REGISTERED TODAY

El Hierro hit by an earthquake of 4.4 magnitude

The National Geographic Institute (IGN) recorded at 18:10 am today, Wednesday, November 2, an earthquake of 4.4 magnitude on the Richter scale which has been felt in almost all of the island of El Hierro.


Sergio Gutierrez, Valverde (11.02.2011. 18:53 pm)
The National Geographic Institute (IGN) recorded at 18:10 am today, Wednesday, November 2, an earthquake of 4.4 magnitude on the Richter scale and intensity III in the EMS-98 scale, which has been felt in almost all of the island of El Hierro.

According to the National Geographic Institute (IGN), as collected by DAILY IRON and could be subject to change, the earthquake was located in northwestern Frontera, 23 kilometers deep.

This morning, El Hierro suffered another tremor of 4.3 magnitude on the Richter scale and intensity IV on the EMS-98 scale. This earthquake occurred at 07:54 hours northwest of Frontera and located 20 kilometers deep at sea. The quake had a magnitude scale IV EMS-98, as recorded by the IGN.

Thus, El Hierro now counts two earthquakes (4.3 and 4.4 degrees) which are the largest recorded in the island after the onset of the eruption south of La Restinga. Both quakes were widely felt.

The National Geographic Institute (IGN) has registered until 18:10 hours on Wednesday, November 2, a total of 78 earthquakes ranging between 1.5 and 4.4 magnitude on the Richter scale at a depth of between 15 and 23 kilometers.

Intensity III EMS-98

As recorded by the IGN, an earthquake of intensity III on the EMS-98 scale is felt by some within buildings. People at rest feel a swaying or light trembling. Hanging objects swing slightly. No harm.

INTENSITY IV EMS-98

As recorded by the IGN, an earthquake of intensity IV in the EMS-98 seismic scale is felt inside the buildings by many and only by a few outside. They wake up some people. The level of vibration is not frightening. The vibration is moderate.

Observers feel a slight tremor or bending of the building, room or bed, chair, etc..

Knocking tableware, glassware, windows and doors. Hanging objects swing. In some cases, visible trembling of light furniture. In some cases crackings of the woodwork. No harm.

[Hervé]

Posted by randles (here)

Thats a big one !!

Yep! Seems that Polly can not only grow big coconuts but also perform "Nutcraker" with 'em too!

[randles]

RTVE.es / AGENCIAS 02.11.2011

El Hierro lives with an earthquake of 4.4 degrees, the highest since the last eruption

Local evening news here of Polly misbehaving

Source: https://youtube.com/watch?v=kLvU17YsCx4

[randles]

RE: Latest reaction by Residents of El Hierro and Tenerife to 4.4 Earthquake..

Again, I am sharing the comments. It is one thing to publish on here updates via the media and other resources of Pollys adventures....,
However.. We are All Human. One. And so I share because..... this is what it feels like.....
This are comments taken directily from www.diarioelhierro.com


"The official statements today are lacking, what happens? there is nothing new to say? or is that they are thinking they can say? and how? say ... 11.02.2011 19:48:38 Alias​​: Conlospelosdepunta"

"I think the most convenient for the safety of the entire population evacuated the island El Hierro is NOW. Everyone knows that the analysis performed in Barcelona is more serious than the politicians have said both canaries and scientists who are on the island. Themselves Catalan University experts warn not to underestimate what is happening, the situation is very serious. Why expect those responsible to take action? There is no official statement by the Government of the Canary Islands What is this? Are you taking action on the matter or pass it? Many unanswered questions. 11.02.2011 19:37:19 Alias​​: Chicharrero"

"This will not stop shaking and I scared today when I saw the tremor. I say! we expect to take action!! 11.02.2011 19:34:19 Alias​​: olga
I heard after the earthquake to a policy saying, more or less, there was as yet no reason to take steps to evacuate the scientists because earthquakes were being too deep. Canary I, I live in Tenerife and I have my son who works in iEl Hierro, for his work now is almost all day on the road. My son is part of my reason for living. Without wishing to hold anyone accountable, pray, take precautionary measures in time, but then nothing happens. A single human life is worth it. Please 11.02.2011 19:21:45 Alias​​: salamander"

"I as a mother I understand and I think the same as you. NOT to wait for it to give less depth and come to regret damage or loss of life and God forbid they'd better 11/02/2011 19:39:15 Alias : a"


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[randles]

EMU and the Army sends equipment to El Hierro

DAILY ANNOUNCEMENTS | Santa Cruz de Tenerife

Emergency Military Unit (UME) with the support of the Army has begun moving to the island of El Hierro the material needed for a camp in which initially could house to 1,200 victims of the eruption is occurring in this island.

Thus, it enhances the safety device in the prevention of iron with a new shipment of logistical, at the request of the Canary Islands.

The material comes largely Canary Command of the Army and consists of modular tents, kitchens, showers containers and other equipment needed to service if the population of the Canary Islands Government consider evacuation.

Until such time or not to evacuate the population, this material will be stored in the barracks 'Anatolio Fuentes' El Hierro in the town of Valverde. On the island are already deployed 29 military vehicles EMU with 17 among the staff is specialized in managing the assembly of the camp.

The transport of this material is being carried by sea from the ports of Tenerife and Las Palmas, and these operations are supported for 27 soldiers and 16 Army vehicles.

The camp of 1,200 spaces would be added to the 540 seats that the Red Cross has stored on the island and also participate in its assembly of the EMU staff, which is deployed in El Hierro since last October, performing recognition infrastructure and supplies as well as participating in safety devices in place.

[randles]

Pollys 4.4 was registered at the Siesmos Stations in La Palma, La Gomera and Tenerife

[randles]

New and Extraordinary Images of El Hierro, courtesy of Cabildo El Hierro 02 November 2011

Source: https://youtube.com/watch?v=6Eux4MCOYbM

[randles]

Scientists ruled out an imminent eruption but the neighbors are preparing for what could happen. Army trucks keep rolling onto the ferries here in Tenerife and then off the ferries in El Hierro, school children practice emergency instructions whilst in school,

Here is a roundup of the evening news here from my Islands..

Source: https://youtube.com/watch?v=Lc6Ugo0GgDA

[Hervé]

Universty of barcelona fear mongerers are getting a serious slap on the wrists:


Canary Islands Government

The first pyroclastics which appeared in La Restinga consist of basalt and trachyte.

11/02/2011 ... 20:11 - Ministry of Economy, Finance and Security

So says the CSIC after the verifications were carried out in several laboratories.

CSIC representatives as part of the scientific committee of the Civil Protection Plan for Volcanic Risk (PEVOLCA) have forwarded, to the direction of the Plan, the preliminary results on the first pyroclastic thrown to the surface of Las Calmas.

The fragments are formed by a mixing between two magma materials, one black (basalt) and one white (trachyte), which occurred at the time of the eruption so it is a physical mixture between the two materials without chemical reaction between the two taking place.

In this regard it is noteworthy that these trachytes are volumetrically insignificant and constitute little more than an anecdote to the main feature of the eruption. In reality the samples have been collected then, the trachyte was only present in the first few episodes as a ratio of 1 to 10 with respect to the basalt, which does not bear any significance on determining the type of the resulting eruption.

Its origin may be due to a remobilization (remelt) of a small remnant of trachyte material by the fresh basalt on his way to the surface. These processes are not so rare in this type of volcanism and occur in a short time (a few hours to a few days).

These results, although they had already been advanced, had not been made public because the series of tests to do in this type of study had not yet been completed, and are not relevant in considering the presence of magma mixing dynamics as driver of the eruption.

It should be noted that studies have been published in the media today and elaborated due to an individual's concern and not a formal request from the City of El Pinar, as he said.

To avoid confusion arising from contradictory information, especially to the residents of El Hierro, the direction of PEVOLCA stresses the importance of the population following the leads of official statements.

To this end and for those scientific and research institutions wishing to participate in the study of eruptive phenomenon, the Canary Islands government has created a Scientific Steering Committee, to achieve effective coordination and discussion of research in order to provide a better guidance to bodies responsible for Civil Protection.

Procedures:
From the first moment CSIC members took charge of the pyroclastic sampling and its analysis following the usual procedure in these cases, ie the samples sent to different laboratories to compare results and to have a spectrum from the broadest possible range of data. Some of the samples were sent to Madrid (MNCN, CSIC), Barcelona (ICTJA, CSIC) and the University of Huelva, where they are doing experimental petrology studies to determine the thermodynamic characteristics of eruptive magmas. In addition, samples have also been sent to Washington State University, in the United States and to Clermont Ferrand, France, for isotopic analysis.

Basalt and trachyte:
Basalt is the most common magma eruptions of El Hierro, has a 43 percent SiO2, reaches a temperature of 1,200 ° C and a density of 2700 kg/m3.

The trachyte is a magma with a SiO2 content of 63%, reaches a temperature of 850 ° C and a density of 2,300 kg/m3. The trachyte is not the predominant magma erupted, therefore does not contribute to an increase of explosiveness.

Both the basaltic material as the trachyte samples are highly vesicular, which means that both had a high amount of gas in the time of eruption, which would explain why it is explosive (pyroclastic formation) despite the sea ​​water pressure at the point of ejection. However, this type of explosion is normal within the parameters of basaltic eruptions with which we are progressing and no additional hazard is due to the fact that it also contain trachytic magma.

[Hervé]

Strongest so far (3.2 at 23:06 somewhere in there... in that Van Gogh soup ):

For the day:

Frequencies spectrogram, the vertical streaks indicate “events” (tremors/EQs) whereas the horizontal ones reflect volcanic/magmatic activity:

How it's looking like now from Las Puntas de La Frontera:

(sorry, webcam off line for the moment)

Refresh your browser to get the latest traces

For the last 10 days, following the count of EQs as shown by the orange bars (≥ 2.0), it now shows a definite increase in seismic activity:

New cumulative graph starting October 10, 2011. The continuously changing scales keeps compressing the earlier graphs to the bottom and to the left!

Location of the EQs for the last 10 days:

Refresh your browser page to get the latest numbers and positions.

[Hervé]

It seems that Ramon Margalef is now heading full speed (> 12 knots) to Santa Cruz de Tenerife:

[Hervé]

Well... it seems that Polly has begun to whistle a similar tune as she did prior to starting her bubble bath, back in October 10-11:

Here is the "tune" whistled over the past few days, seen as the increased agitation of the harmonic frequencies:

From Wikipedia: A Harmonic tremor is a sustained release of seismic and/or infrasonic energy typically associated with the underground movement of magma and/or venting of volcanic gases from magma. Being a long-duration continuous signal from a temporally extended source, a volcanic tremor contrasts distinctly with transient sources of seismic radiation, such as tremors that are typically associated with earthquake and explosion.

In the higher harmonics of sound frequencies, this would sound like the wooooawwooooawwooooaww of a twin-engine which engines are almost synchronized but not quite....

Would be interesting to know if this would correspond to two magma chambers getting mixed?

[Hervé]

Something that bothers me with the IGN cumulative energy graph is that it should display a similar gap length for the recent 4.3 and 4.4 as it does for the original 4.4 of October 8... yet they don't appear as such on any of their graphs... (in case someone from IGN peruses this thread...)

This is what the above graphically means that's missing in the IGN graphs (thanks to Geolurking who just posted a video I found after writing the above):

******************

Seems like IGN corrected the first 4.3 one, on one their graph (03:15 GMT).

Second correction for the 4.4 energy jump done as well (06:41 GMT)! On both graphs (since July and since Oct. 10)

[Hervé]

Here is Geolurking new video showing that, roughly, El Pinar is sinking (Millimeters) and Frontera + W. Frontera are bulging:

Source: https://youtube.com/watch?v=W6qUXEF0ZCk

*************

Which means, for those who have been following the thread assiduously, that the toothpaste tube is getting a refill!

[randles]

El Hierro on Orange Alert for 5 Meter High Waves

DIARIOELHIERRO.ES, writing (11/03/2011)

The Meteorological Agency has activated this Thursday, November 3, an orange alert on the island of El Hierro by coastal phenomena. Rough seas are expected and will cause waves up to five meters.

The warning will remain active until 00:00 pm tomorrow. Friday 4,, as recorded by the Meteorological Agency on its website.

For its part, AEMET expected for today, Thursday 3 in El Hierro that time will be partly cloudy becoming mostly cloudy early rise, with light rain most abundant in the north, decreasing in the afternoon.

Temperatures generally unchanged, slight rise of mediocrity minimum. Weak westerly wind to moderate, turning northwest in the afternoon.



...........

Please be aware that at this time of year here, it is very common for the seas to change frequently like this. It happens all of the time

[randles]

Scientists do not agree upon the composition of the pyroclastic

Sergio Gutierrez, Valverde (03.11.2011. 07:30 am)

We are becoming accustomed to the conflicting views that happen at certain times (not all), to which we have been undergo since the beginning of the seismic-volcanic crisis. Now this kind of''war''has gone to scientists. And how could it be otherwise, each one handles a different report on the composition of the pyroclastic found in waters of La Restinga.

Since this crisis reached its highest level of concern, we have witnessed the eruption confirmed in the morning, in the afternoon disproved again, be confirmed again in the evening.

We are told one day that "there are no warning signs that anticipate an impending eruption at Frontier" for the next day, not to dismiss an eruption in the north of the island. We have closed the tunnel at the risk of landslides by earthquakes (now open) and we have experienced two earthquakes of more than 4 degrees and countless that have been felt by the population of 3 or greater in magnitude and intensity). And La Restinga is on red alert with a volcano expelling magma a few kilometers from the coast. In El Golfo (on yellow alert as the rest of the island), seismic activity is increased while its inhabitants do not know what to do and what is really happening. More Army troops arrive to the island and the Red Cross warns that they are on alert and well "ad infinitum".

As if this were not enough, now the "war'''seems to have moved to the scientists. Yesterday morning Diario EL HIERRO published a report prepared by Professor of Petrology and Geochemistry, University of Barcelona, Sunday Gimeno Torrente, where, according to the tests, ensured that the pyroclastic found in waters of La Restinga provide "clear evidence of a greater explosive potential, so far not mentioned publicly by anyone.

The professor added in his report that this material "does not exhibit the characteristics of a surtseyano like rash, which is the stage repeatedly proposed by the scientific monitoring committee."

Among other things, this professor at the University of Barcelona, complained that "it has underestimated the potential explosive." "They have drawn all the time surtseyano volcanism hypothesis (all 4 phases), trivializing its potential explosiveness (10 hours of beautiful white column before anything happens), and before that an effusive volcanism hypothesis (lava, non-explosive ) deeper, and indeed since the surface began to appear in the pyroclastic should have understood that it was explosive submarine eruption and a different type, and if, moreover, implied magma mixing was potentially much more dangerous, and rhyolitic magma even if it meant more, "said Gimeno.

Following the publication of this report, only a few hours sufficed for the Pevolca issue a press release saying the opposite that Professor Gimeno. According to CSIC scientists who are part of the scientific committee of the Civil Protection Plan for Volcanic Risk (Pevolca) against the report by Professor of Petrology and Geochemistry, University of Barcelona, Sunday Gimeno Torrente (published by DAILY THE IRON), CSIC scientists argue that the fragments are formed by a magma mixing between two materials, one black (basalt) and one white (trachyte), which occurred at the time of the eruption.

According to scientists, these trachytes "are volumetrically insignificant and constitute more than an anecdote to the main feature of the eruption." "In reality, the samples have been collected along these days, the trachyte was only present in the first few episodes as a ratio of 1 to 10 with respect to the basalt, which does not involved in determining the resulting type of eruption. "

That is, on one side some reports prepared by a professor at the University of Barcelona (made by self-interest of the teacher) argue that the fragments are typical of a major explosion. And, on the other CSIC members tell us that "constitute a story. "In other words, more of the same. Yes, but no. Maybe, maybe. There may be an eruption not, it may be explosive or maybe not ...

The truth is that regardless of the reports handled by scientists or others, just off the news in Diario EL HIERRO outcomes assessment in the pyroclastic by the CSIC seem to have precipitated what has not been said in weeks, has come to light only a few hours, rather, on the other hand, that is appreciated in these times of limited information.

The Reply of Profesor Domingo Gimeno Torrente

For his part, Professor of Petrology and Geochemistryat the University of Barcelona, Domingo Gimeno Torrente after the government's reply, told Diario EL HIERRO "As a scientist I am pleased that after more than 2 weeks of rash, casual and temporal coincidence with the appearance of my report (referred to Pevolca Juan Santana on Wednesday, November 2 at 10.20 hours, by email), we could finally have news of a chemical analysis of rock that should and can be done in a few hours after the onset of an eruption. "

Gimeno Torrente added: "I ​​am pleased also that the to interpret similarly curious as I did, (magma mixing in very shallow waters), but is certainly one way to later and contradictory to what they had said so far (purely basaltic eruption ) despite being alone in having had access to all information and samples from the first moment, "he said.

According to this professor (which is reaffirmed in its report), "and with regard for my basanite is a basalt and rhyolite as a trachyte, may correspond to different compositions at different sampling times, or interlaboratory analytical differences. In this respect the laboratory of the University of Barcelona is working with quality control and standards, and when we have real numerical data by the scientists responsible for monitoring the eruption we will conduct a valuation exercise and comparison, "he said.

[randles]

So is the sign of the tremor now. IGN

DIARIOELHIERRO.ES, writing (03.11.2011. 11:00 pm)

The direction of Pevolca now studies what to do with the residents of La Restinga, in the face of vibrations felt in the town this morning.

According to Pevolca, this process is associated with a discontinuous pulse dynamics in the tremor. Civil Protection authorities and scientists together to analyze these signals now, if given a situation of risk for the population, they will take appropriate action.

Also, eyewitnesses have confirmed to Diario EL HIERRO in the area bubbling eruption has increased and the emission of gases.

[randles]

A police officer in La Restinga Canary Islands on Thursday..

The bubbling returns in the Sea of Calms

The bubbling has re-emerged for several minutes in the sea calms. From the coast of La Restinga in El Hierro has been observed bubbling to the surface. Several neighbors, who observed the phenomenon from Arena Blanca in Punta de La Restinga, expressed their frustration with cries like "We see again, another time ".

Moreover, the Canary Islands Government has sent a press release Thursday in which it states that "in the face of vibrations felt this morning in La Restinga, moves from the direction of PEVOLCA that this process is associated with a discontinuous pulse dynamics in the tremor. "

"The Civil Protection authorities and scientists together to analyze these signals now, if given a situation of risk to the population, take appropriate action," the note said.

[randles]

At dawn on Thursday the islanders have had a break. According National Geographic Institute (IGN), between 00:00 hours this morning and 7:20 hours there have been only 18 earthquakes.

This figure is much lower than those recorded in previous days: on Wednesday there were 99 earthquakes on Tuesday 69 and Monday, 153.

In addition, all earthquakes early Thursday have been below 3 degrees of magnitude.

The last felt by the population occurred at 22:08:42 pm on Wednesday and reached 31.1 degrees of power.

[Sidney]

Forgive me if this has been posted already. ocean footage of eruption area from dutchsinse channel.


https://youtube.com/user/dutchsin.../0/rtq8ACRVibQ