[breaking] Vulkaanuitbarsting bij Canarische Eilanden #2

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Overview update 03/11 09:07 UTC :
A further climb in harmonic tremor since a number of minutes. The frequency of the tremor has hardly changed since many days. A sharp change in frequency (the colors in the lower part of the graph) will probably coincide with a new event (not necessarily a new vent).

Overview update 03/11 08:47UTC :
In an attempt to give a better view on what we are describing about harmonic tremor in many updates below, we have assembled the data of the last 3 days.
** FYI Wikipedia description of Harmonic tremor : Harmonic tremor describes a long-duration release of seismic energy, with distinct spectral (harmonic) lines, that often precedes or accompanies a volcanic eruption. More generally, a volcanic tremor is a sustained signal that may or may not possess these harmonic spectral features.
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.**

3 days harmonic tremor assembled - all data courtesy IGN - Click on the image to watch the bigger size image


Overview update 03/11 08:12UTC :
- Pevolca has announced yesterday evening that based on yesterdays data, they could not conclude that an eruption is imminent.
- Increasing harmonic tremor and a turbulent seismogram are contradicting the words of Pevolca. The IGN scientists at Pevolca have however a lot more data than published on the IGN website. (see below)
- Some of the more experienced amateur volcano followers ( Iceland volcanoes) @ jonfr.com have other opinions, although they admit that not having all the data is a problem to have a truly good view on the situation. The discussions go often very deep and tend to become very technical.
- One of the problems for scientists is that the past Surtseynian eruptions like the ones that happened in Iceland and in the Azores, are not as documented as eruptions are today, which make comparisons rather difficult.
- Earthquake-report.com wants to thank the many readers who are writing us with tips, local contact persons, etc. This help is not only appreciated but essential to verify upcoming events.
- IGN has listed 19 earthquakes since midnight, the strongest one being a 2.7 to the West of Frontera. The depth varies in between 12 km and 22.10 km. Nothing special one would say, but harmonic tremor is indicating constant magma stress below the volcano.

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The pyroclastic de La Restinga are composed of basalt and trachyte with no chemical reaction

CSIC representatives as part of the scientific committee of the Civil Protection Plan for Volcanic Risk (PEVOLCA) have moved into the direction of the Plan, the preliminary results on the first pyroclastic thrown to the surface of the Sea of calms. 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 so it is a physical mixture between the two materials without the two chemical reaction has occurred.

In this regard it is noteworthy that these trachytes are volumetrically insignificant and constitute more than an anecdote that 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 type of resulting eruption.
Its origin may be due to a Remobilization (reflow) of a small remnant of material from the basalt trachyte again on his way to the surface. These processes are not so rare in this type of volcanism occur in a short time (a few hours to few days).
These results, although they had already been advanced, had not been made public because it had not yet completed the series of tests to do in this type of study, and not relevant to consider that the presence of magma mixing as driver dynamics of the eruption.
It should be noted that studies have been published in the media today during a concern is for staff responsible for its production and not a formal request from the City of El Pinar, as he said.
To avoid confusion arising from contradictory information, especially the residents of El Hierro, the direction of PEVOLCA stresses the importance of following the official statements that leads to the population. 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 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 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 of Clermont Ferrand, France, for isotopic analysis.
Basalt and trachytes
Basalt is the most common magma eruptions of El Hierro, has a 43 percent SiO 2, 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 increase the explosiveness of it.
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 on the mouth of issue. However, this type of explosive is normal within the parameters of basaltic eruptions with which we move and no additional hazard is of the fact also contain trachytic magma.

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NOTE AVCAN 299 - EARTHQUAKE ACTIVITY-VOLCANIC -El Hierro ISLAND - 03 November 2011-12:00h - peninsular - Seismic activity remains high, with moderate seismicity in the El Golfo region in terms of number of earthquakes and their magnitude and with a signal tremor through the roof, noticing especially in Restinga area, saturating the sensor and prior to the first eruption, but more unstable and numerous explosions. The magnitude of the earthquakes between 4.4 and 1.4. New earthquakes 41. Earthquakes senses 2. Depths between 16 and 22km (and two to 15 and 15km and two at 24 and 25 km). The day before yesterday 69. Yesterday 101. Now go 22. A total of 11,022 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

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The tremor is triggered, indicating the nearby opening of a new mouth or eruption, that's the first thing we see today, so please you are in alert and aware of warnings can be issued. Also have been a number of earthquakes, particularly the following from the last part. If you have any sense, do not forget to fill in the questionnaire IGN (Enrique):

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Evolution of the stain and photos of the Civil Guard helicopter seems to have taken this morning in front of the Restinga and furnished to EFE that can be seen daily in the province and where the point seems to be eruptive. (Enrique).

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According to the latest PEVOLCA statement: "The scientific committee spokesman Civil Protection Plan for Volcanic Risk (Pevolca), Carmen Lopez, said that Border seismic events, which have intensified in recent days ... correspond to the stage of La Restinga underwater eruption, which began on 10 October.

Lopez noted that the high seismicity that has occurred with magnitudes of 4.3 and 4.4. has affected the feedback mechanism of the process magmatic eruption of La Restinga, "generating a process of 'rectified diffusion', an injection of magma pressure in the emission rate increases and releases large amount of gas."

This phenomenon is what has been represented in discrete pulses of tremor and new spots appeared on the surface of the Mer de las Calmas, which turn white, brown along the pyroclastic material, precisely because of the presence of gases .

However, scientists do not completely rule out that another seismic "smaller and smaller scale" that is occurring at 15 kilometers deep in Earth's crust in the area of El Golfo, could result in a submarine eruption, but not imminently. "

However, in this interview with a scientist aboard the Margalef said that there are cracks in El Golfo and is observed on the rocky bottom sediments new generation of them. Full saying there's a new fracture and is out some material in suspension.

Encuentran fisuras en el norte de la isla por donde sale material

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In the graph of the evolution of seismic energy by half every 6 hours and a half deep, you can see the evolution before the eruption of the first swarm to the eruption, then the system is no longer representative to start with disperse seismicity and volcanic system reactivated with this second swarm holding at the same depth from day 20 to 22 October when the intrusion began, staying between 20 and 22 km, with some forays to shallower areas about 17 km, but the latter must increase days the area of activity is unstable and fluctuates more.

In principle one might think that we need more activity in the northern shallow ahead of a possible eruption, although tremor signal so that small earthquakes are not detected, may not see ... although I think there will be shallow earthquakes before the possible eruption of the northern zone (Enrique).
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In the graph of evolution of the depths of the earthquakes from October 1, you can see the activity of the pine forest before and after the eruption. You can also see how the second swarm activity centered in the Gulf was concentrated until five days in two horizontal zones or sills between 19 and 23 km and a shallower between 16 and 17 km, taken as the last days are merging as one area, indicating that whatever is coming up from below, but has not yet come up. (Enrique)

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Update 03/11 23:45 UTC :
Earthquakes are getting stronger again. Just recently at 23:06 a quake at 22 km depth measuring M 3.2 occurred NW of Frontera (the first one today above 3).
Update 03/11 22:53 UTC :
The pictures below are courtesy of the Presidencia del Gobierno de Canarias
These pictures have been taken out of a helicopter and are showing the November 3 jacuzzi (burbuja in Spanish). No green stain today but the grey muddy color is present. It looks to us that the new spot is at a bigger distance from the coast.



Click on the pictures to see them at full size images courtesy Presidencia del Gobierno de Canarias
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New October 31 RapidEye satellite picture
What do we see new on this partly too cloudy image.
- the light green stains are far bigger than seen previously as dark green stains on the Guardia Civil pictures (the dark green stains on the RapidEye pictures are shadows of the clouds).
- the grey muddy eruption vent activity was not seen anymore on October 31 (Raymond looks to be wrong here as he stated that the venting continued all the way)
- that the current to the right of La Restinga blocks the stain from being spreading to La Estaca
- a big mystery is the coloring in the El Golfo bay. was this coloring created by the sea currents or by new activity
- the dark green patches can also be seen in the El Golfo area (see comment about colors above)!
- why not asking IGN or CSIC scientists to explain what we see on the images, which we repeat, are far better than anything else we have seen so far.
The images have not been ordered by the Spanish state or anybody else, but are an initiative of RapidEye themselves. The least Spanish scientists can do is sending a thank You message to the RapidEye management.
Click on the picture to see the full image


Overview Update 04/11 08:31 UTC :
- 16 + M1.5 earthquakes since midnight, 15 were greater than 2 and 10 were greater than 2.5.
- based on the data above, it looks that the seismic activity will further increase today. We expect that we will have multiple +3 quakes during the rest of the day.
- we are not sure at all, but it looks that the new Jacuzzi location is different from the October 10 one. If this would be true then the place of the current eruption will have another depth. We hope that the scientists will publish a report with the exact location parameters and/or depth of the new vent (if new) so far we havent seen them
- Joke barometer says all quiet in the village if someting new did happen, she sees it immediately as people behave more nervous and start discussing the subject

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Border seismic events are the scene of the submarine eruption of La Restinga

The direction of PEVOLCA remember that there is risk to the public but all civil protection resources are activated

Frontera seismic events, which have intensified in recent days, corresponding to the scene of the submarine eruption of La Restinga, which began on 10 October.

This has been reported Carmen Lopez, spokesman for the scientific committee of the Civil Protection Plan for Volcanic Risk (PEVOLCA) after the meeting of the Steering Committee. Lopez noted that the high seismicity that has occurred with magnitudes of 4.3 and 4.4. has affected the feedback mechanism of the process magmatic eruption of La Restinga, "generating a process of 'rectified diffusion', an injection of magma pressure in the emission rate increases and releases large amount of gas."

This phenomenon is what has been represented in discrete pulses of tremor and new spots appeared on the surface of the Sea Calm, which turn white, brown along the pyroclastic material, precisely because of the presence of gases .

However, scientists do not completely rule out that another seismic "smaller and smaller scale" that is occurring at 15 kilometers deep in Earth's crust in the area of the Gulf, could result in a submarine eruption, but not imminently.

This eruption would be similar to the South, but given much more depth of ocean floor bathymetry in the area. In any case, it would be necessary to give other values that "at this time do not exist." Note that in this day the ground deformation has stabilized in the North, which had experienced some acceleration in recent days and is significantly relaxed in the south. To this is added the decrease of the seismicity and the stabilization of the tremor signal. Lopez wanted to point out that historically, in the Canaries, "no two eruptions have occurred simultaneously."

Despite the alarming situation has created this situation for the population, the Director General of Security and Emergency of the Canary Islands, Juan Manuel Santana, stressed "the eruption of the South no risk for the population" and insisted that Scientists are monitoring for 24 hours, at the slightest variation of the current trend "must preactivated all civil protection resources."

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NOTE AVCAN 301 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 04 November 2011-11:30 h peninsular - Seismic activity remains moderate to high, with seismicity is moderate in the El Golfo area (all over 2.0 less than an earthquake) and signal with a very high volcanic tremor since yesterday and is still increasing in the last hours, noticing especially in Restinga area, saturating the sensor and unstable behavior and numerous explosions. The magnitude of the earthquakes between 3.2 and 1.9. New earthquakes 24. Earthquakes senses 2. Depths between 17 and 23km (and one at 15km). The day before yesterday 101. Yesterday 101. Now go 17. A total of 11,056 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

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Transit seismicity, since the beginning of the crisis, not traditionally present day, but by event. Each seismic event, in terms of their energy release and position change the route followed by a supposed "seismic center of gravity" would be found under the Tanganasoga now. This chart takes much computational time because each point is the result of comparing every event against everyone else that has been. (JR)

Foto

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Update 04/11 10:51 UTC :
An helicopter is currently flying above La Restinga and the Las Calmas Sea. Let us hope that he is shooting images and video.

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Update 04/11 11:19 UTC :
Pevolca will call a meeting in La Restinga at 18:00 local time to inform the villagers about all current activity.
Rapideye foto's van 26 en 31 okt.

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El Hierro May Have New Volcanic Vent

PEVOLVA and the National Geographic Institute (IGN) have announced how El Hierro has recorded a total of 24 Earthquakes since midnight and 11.00 hrs CET this morning, averaging around 3.0 on the richer scale.


The highest was measured off the North-West of the Island at 3.2 less than 1 hours ago, with the remainder measuring from 1.9 to 3.0, with ten of the quakes measuring over 2.5.

The depths of the activities were around 22km.
Observers have noted the high number of earthquakes with a stronger magnitude and expect that this will continue throughout Friday.

Meanwhile, to the south of the island and off the coast of La Restinga, Scientists have noted a change in the colour of the stain and bubble formations rising to the surface as a result of the volcanic eruption, and are looking into the possibility of a further vent now becoming active.

A helicopter is currently flying above the eruption zone in order to gather further information for analysis.

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'We hope the volcano does not explode'

MEDINA MOROTE CIRA explosive or harmless, that is the question. The apparent discrepancy between the data provided by the Pevolca and professor at the University of Barcelona Sunday Gimeno on the dangers of magma of El Hierro had yesterday its second chapter. "Hopefully they do not disprove the volcano with a large explosive eruption," the Catalan researcher, who told this newspaper that, contrary to what CSIC scientists argue, "most of the rhyolite pyroclastics are volumetrically" that is, one of the most explosive magmatic material existence.

Of course, if someone has had access to the volcano's pyroclastic at mar de Las Calmas, these have been the CSIC volcanologists Joan Martí and Ramon Ortiz, who have been integrated into the Pevolca from the beginning. On Wednesday, Gimeno gave the bell with his explosive conclusions. In his report was clear that the City of El Pinar which requested the chemical analysis of samples was done for free, "because it is a sample collected in the context of national emergency", and the University of Barcelona is a public body.

It also describes all the techniques that were used to obtain the data and the time elapsed since the arrival of materials, October 27, until they could make findings, only two days later. The question that the scientist is why, if so immediate analysis, the public did Pevolca their data until Wednesday, coinciding for his appearance in the media.

The fact that the analyzed material containing rhyolite gives a special explosive power, which has been consistently dismissed by experts Pevolca. But that is not all. "The presence of pyroclastic material in the differential is significant, regardless of the genetic interpretation to be given, provides clear indications of a much larger explosive potential, so far not publicly mentioned by anyone, as we have been monitoring the news in press, radio and national television, "says petrologist in the report. He continued: "The inhomogeneous mixing of different magma compositions is a phenomenon widely reported in the literature as increasing the explosiveness of a magma, and on many occasions as a trigger for an eruption."

The point is that, at all times, there has been talk of an eruption surtseyana, quiet apart from the time the magma hits the surface, when a column of steam, followed a few hours, an ash , the famous rooster comb, which has given much play. Well, not always according to Gimeno. "The test material does not exhibit the characteristics of a surtseyano like rash, which is the stage repeatedly proposed by the scientific monitoring committee, at least for more than a week in the first phase of the eruption," he says.

Professor at the University of Barcelona can not escape to devote the final paragraph of his report to the manner in which the crisis is being managed El Hierro. "We must make the effort to attract talent, first local and national environment closer, prioritizing the description and understanding of personal hypotheses or small groups. Since it is also obvious, urgent works are used public funds and is played with the safety of persons and property ".

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Apparently, the PEVOLCA will meet this afternoon at 18:00 hours with the residents of La Restinga and tomorrow at the same time do so in the Llanillos. Some reports suggest that these meetings could be direct between scientists and residents, that is, without the mediation of political representatives. From AVCAN propose, if it seems appropriate that we discuss what questions they would like to ask members if they had that opportunity PEVOLCA. Perhaps that helps for some of the people attending. Please ask questions that proposed are concise and aimed at clarifying the situation. It is an opportunity for residents, so they can answer your questions, so we understand that there is no room for criticism, insults and speculation. Thank you for your cooperation. (Fernando)
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The volcano is smoking again and ejecting pyroclastics

The submarine volcano has returned to La Restinga morning drive to smoking pirclastos sea surface, as confirmed by sources on a daily face IRON. There are many residents who have contacted this newspaper to inform us that plumes observed in sea surface product of the expulsion of this material.

DIARIOELHIERRO.ES, writing (04.11.2011. 11:50 am)
The submarine volcano has returned to La Restinga expel pirclastos smoldering this morning to the sea surface, as confirmed by sources on a daily face Hierro. There are many residents who have contacted this newspaper to inform us of the smoke observed sea surface.

For its part, the scientific committee spokesman Civil Protection Plan for Volcanic Risk (Pevolca), Carmen Lopez, said yesterday that seismic phenomena Frontera, which have intensified in recent days, correspond to the scene of underwater eruption La Restinga, which began on 10 October.

Lopez noted that the high seismicity that has occurred with magnitudes of 4.3 and 4.4. has affected the feedback mechanism of the process magmatic eruption of La Restinga, "generating a process of 'rectified diffusion', an injection of magma pressure in the emission rate increases and releases large amount of gas."

This phenomenon is what has been represented in discrete pulses of tremor and new spots appeared on the surface of mer de las Calmas, which turn white, brown along the pyroclastic material, precisely because of the presence of gases .

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The most remarkable increase in tremor in my view, implies an increased flow of magma, which produces cavitation induced vibration is observed in both seismographs, as part of the population of the Restinga. Where magma is leading this ....? The submarine volcano Restinga of course, but ... Have you opened any new mouth submarine that allows pressure relief magma? May it be so. (JR)
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Imágenes del vuelo del GES sobre la alineación de las zonas de emisión

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The tremor of the Restinga in the south is increasing in amplitude from this morning to saturate the sensor signal, but still fails to completely saturate the sensor as it did in early October. The seismicity in El Golfo north indicates that the volcanic system is pressurized, the 3.8 of a while ago, is a mark that will continue until the seismicity depressurize or lose strength.

In principle it shows activity in the mer Las Calmas, fissure type, but not a big mouth is defined to allow a drop of clear tremor, so I think it will continue opening mouths, and increasing the road , is still closer to the coast, so there will be very aware if a mouth opened near the coast and / or land to be very alert to official information they can get on the evolution of the phenomenon (Enrique)
Link

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Op zaterdag 5 november 2011 07:21 schreef Takkembah het volgende:
Nog een 3.3 om 00.11 geweest

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The direction of the Civil Protection Plan for Volcanic Risk (Pevolca) decided last night to close the access road tunnels Roquille until 07:30 in the morning as a preventive measure before the earthquake of intensity 4.4 on the scale Richter took place at 20:36 hours in Frontera and the possibility that it could raise that amount, according to warnings from the National Geographic Institute (IGN). The opening of the tunnel in the morning was expected to surveillance and security measures.

It has also carried out the eviction of the 11 houses of the points that were more likely to be affected by landslides.
These preventive measures are discussed in separate morning meetings of the scientific committee and steering committee to assess maintenance or making other decisions that may be necessary depending on the situation.
EARTHQUAKE
The Emergency Coordination Center and Security (CECOES) 1-1-2, under the Ministry of Economy, Finance and Security of the Canary Islands, received between 20:37 and 21:28 yesterday evening, 45 calls by inhabitants of the three municipalities of El Hierro and related to the earthquake that occurred this evening on the coast of the island
Also in that same time slot, the CECOES attended some calls from the municipalities of Arafa and Santiago del Teide, both located in the south of Tenerife, and Valle Gran Rey in La Gomera.
The most important incidents connected with this phenomenon have been associated with some detachments located in the heart of Sabina and in the area of Guinea, without consequences.
In this sense, IGN has confirmed to the direction of Pevolca that there was an earthquake of magnitude 4.4, the western border, with a depth of 21 kilometers.

El volcán burbujea.MOV

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NOTE AVCAN 303 - EARTHQUAKE ACTIVITY-VOLCANIC - El HIERRO ISLAND - 05 November 2011-11:30 h peninsular - Seismic activity remains high, with seismicity is moderate in El Golfo area and volcanic tremor signal in the area of La Restinga that after a decline yesterday, has gone up saturating the sensor and unstable behavior and numerous explosions. The magnitude of the earthquakes between 3.9 and 1.9. New earthquakes 20. Felt earthquakes 3. Depths between 17 and 21km (and one at 11km and another 25km). The day before yesterday 39. Yesterday 37. Now go 14. A total of 11,091 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).
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The volcano of El Hierro loose slag by several craters

Researchers aboard the research vessel 'Ramon Margalef' studying whether it has opened a new mouth in the north of the island after finding "new generation materials" and gas leaks in El Golfo.

The volcano has been living for three weeks with the residents of El Hierro is more awake than ever. So much so that in their eagerness to be noticed has opened several mouths to keep throwing the slag as it is called the material released in the Atlantic with an eruption.

A helicopter ride over mer de las Calmas allowed scientists to monitor the evolution of the volcano certify the existence of a string of craters could be three open in a straight line quite well defined. A row of gas bubbling and steaming pyroclastic would correspond with the fracture of the crust, more open than ever, which Hierro volcano unleashes its power.

By releasing tensions that crack, the technicians of the National Geographic Institute (IGN) observed a "significant" decrease in the number of earthquakes that shook the north of the island because of the volcanic magma bustle output below El Hierrro.

Thus, only 39 earthquakes recorded IGN on Thursday a sense by the public and the press time numbered only 26 in the day yesterday, on an island used to half a hundred earthquakes a day. Of course, a magnitude 3.8 earthquake with an epicenter located just five miles from Frontera represented the only shock to the northern population, while in the south watching the bubbling volcano, closer than ever to La Restinga.

The question of a crack in the north
To these concerns was added a doubt, the possibility that a small crack had opened in el Golfo, against Frontera, suggested by the current head of the research vessel campaign Ramon Margalef, Eugenio Freire. Apparently, last Thursday observed some release of materials at those seabed, but the ship had to return to port of Los Cristianos on Tenerife Island to refuel and take on board new teams of researchers.

Yesterday, the Ramon Margalef returned to the waters of El Hierro to verify this impression, which officials said could not be confirmed. Freire had claimed that "there are sediments new generation" on the ocean floor: "There are some cracks and some stuff is coming," said lead researcher of the Spanish Institute of Oceanography (IEO) was quoted by Antena 3 Canarias. Freire is the third campaign chief scientist Ramon Margalef eruption on the phenomenon of El Hierro, whose mission is to analyze the physico-chemical state of the waters. The vessel's presence will help clarify the situation, as when doubts arose about whether he had in front of La Restinga eruption at first.

The head of the first campaign, the IEO researcher Juan Acosta, who was in charge of studying in detail the geology of the seabed islanders, last week also noted an anomaly in these soils, "small gas leaks very fine" that could be of "volcanic or biological." He described the terrain in that area contains an old scar the result of an underwater landslide.

Yesterday, the priority of the authorities was to the south, La Restinga, where they held a meeting with residents on Thursday after some of them leave their homes in fear. The scientific spokesman of the crisis committee, María José Blanco, said that there is a single eruption in progress, but fissure type being the material always comes out the same place. In addition, the researcher explained that the volcano IGN maintains an "irregular emission rate" marked by seismicity that occurs in the north of the island.

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The seabed south of El Hierro, before and after the new volcano eruption

The team of the Spanish Institute of Oceanography (IEO, public research body under the Ministry of Science and Innovation), which develops from the Oct. 23 on a scientific mission on board Iron Ramon Margalef, has been compared in images before and after the appearance of the underwater volcano in the south of the Canary Island.

Comparing the 1998 image, taken from the Oceanographic Research vessel Hesperides, with this week by the Ramon Margalef, current studies allow us to interpret the submarine valley as the trace of a fault or fissure, at the end of which it is produced rash and creation of the new volcano.

Moreover, scientists have obtained the first video recreation of the crater of a volcano. The volcano has 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.


The image shows a topography module compiled from data obtained in 1998 with the Oceanographic Research Vessel Hesperides in the area of El Hierro, in the Program "Spanish Exclusive Economic Zone" that led the Navy Hydrographic Institute (MMI) Defense Ministry and the Spanish Institute of Oceanography (IEO) under the Ministry of Science and Innovation. This image reveals how much was raised from the seabed before the onset of the new volcano, the circle indicates the bottom topography at the time, which corresponded to an underwater valley.


This second image was captured on board the research vessel of the IEO Ramon Margalef. It clearly shows the volcano of new creation, and the morphology of a tongue of lava, rising from the crater, runs downhill along the course of the old valley.

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El Hierro volcano enters Surtsey eruption phase
Posted on November 6, 2011 by Jón Frímann
This is a short blog post about latest events.
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Earlier tonight a Surtey eruption started in El Hierro volcano. Before this phase did start there has been increased harmonic tremor on seismometers that are located on El Hierro Island. Volcano ash is to be expected while water can still get into the crater. When the water does no longer get into the crater it is going to stop making volcano ash. The ash plume can go up to 3 to 10 km high, depending on the strength of the eruption. New vents have also been opening up south of town of La Restinga. That means the fissure is still growing, at least that was the case yesterday and earlier today from what I can gather. I am unsure of that has continued or stopped.

Earthquake activity still high north west of the town of Frontera. This suggests that fissure might open up there. But so far that has not happened. I do not think this are earthquakes due to tectonic stress changes due to the eruptions in south El Hierro volcano. But this stress changes are because of the magma injections at depth in El Hierro volcano.

Harmonic tremor from the eruption in El Hierr volcano. It now shows clear signs of explosions (strong ones) and increased eruption activity. Copyright of this picture belongs to Instituto Geográfico Nacional.

If new vents open up closer to the shore there is going to be instant Surtsey eruption activity. But that might only last for a short while the water gets into the crater. There the lava stage is reached much sooner then on the vents that are erupting on more depth at the moment.

I am going to post more updates on this. If I can get more details on what is going on.

Sources:

Renewed Eruptions at El Hierro in the Canary Islands (Eruption blogs)

El Hierro 6 November 2011

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Important Update 07/11 09:58 UTC :
Raymond Matabosch latest report just in from his (safe) viewpoint.
Analyzing the current situation, there is no doubt that the submarine eruption is very active again. I am still convinced that a collapse of the top part of the new cone occurred yesterday morning (Sunday). The eruptive area colors brown and shows a large accumulation of pumice.
The jacuzzi is showing more activity and the bubbles are getting more important with steam jets on the surface of the water.
The buildup of the new top of the cone may explain the shaking of the ground due to underwater explosions It would not surprise me that the eruption spot will show plumes of steam and ash blowouts in the coming hours


Update 07/11 09:28 UTC :
- Reader Marco Schaapherder just told us that we might not have seen a shift in earthquake depth since midnight. He was right! Magma may have found his way up a few more km, as the focal depths are getting up to 14 km now.
Important Update 07/11 08:52 UTC :
Raymond Matabosch just reported that he had earthquakes all night in his current position at the Las Calmas sea. Raymond is thinking that the earthquakes he is feeling are rather submarine explosions and NOT the regular earthquakes we can see on the seismograph.

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The tremor has changed, has since shortly before 11:00 am much more volatile, with sharp rises and falls like a few days ago, and saturate the especrograma explosions, it may be again by pulses, which can raise the water several meters and the other day ... (Enrique)
-------------
In the graph of the evolution of the mean depth of 6h of seismic energy released can be seen the evolution of volcanic seismic first swarm in the las calmas and the time when the eruption began, with several earthquakes superficial. After the seismicity was scattered and then from October 22 earthquake swarm began the second-volcanic area of el golfo.

This second volcanic seismic swarm was more or less stable in terms of depth, but in recent days, more or less from the first of the month, tends to rise, starting from the 21-23km where he began to 19-20 in the which is now, with increases to the wild area between 16 and 17 km and anomalous data up to 11km and that corresponds to the shallower earthquake of 3.6 occurred in the area of pine forest which is not representative of the graph.

In summary, the graph indicates that the volcanic system beneath the Gulf Valley area progressing to the surface (Enrique).

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The volcano fires a "big rock"

By midmorning on Monday has revived the eruption in El Hierro with a bubble of gas and ash on the surface of the sea of ​​calm, although smaller than that of Saturday.

Witnesses describe it made ​​a "huge stone"-a pyroclastic-that was thrown. The Civil Guard urgently evacuated neighbors who had come to La Restinga to collect belongings.

Canarian Government sources point out that the Civil Guard was limited to accelerate the exit evaqued residents are housed in the residence of Valverde and at that time were in town.

It (la Restinga) has been banned from the neighbors come to town to pick up belongings at home, but they are very pcoos those who make use of this possibility during Monday.

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07/11/2011 @ 12:49 Residents of La Restinga have been urgently evacuated after the bubbling and steaming effect increases in intensity and what was described by residents as a huge rock or stone was expelled from the epicentre.

07/11/2011 @ 12:24 After a day of little activity yesterday (Sunday), the underwater volcano eruption has today started to spew out lava and steam off the coast of La Restinga.

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El Hierro Eruption: Quite the Jacuzzi

We saw a lot of steaming, bubbling and even some small explosive activity at El Hierro over the weekend not much has changed since Saturday, but I wanted to share this great set of image. On the left is the bubbling ocean south of El Hierro amusingly termed jacuzzis by many readers. On the right is a thermal image of the jacuzzi showing just how warm the ocean water has become due to the eruption with is likely sources at least 50-100 meters below the ocean surface

Check bron voor verdere verhaal en verklaring van de hotspot/yacuzzi

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Update 08/11 08:32 UTC :
IGN and Graphics rescaling
- When discussing the activity with Raymond during the night, he hard a hard time believing that the harmonic tremor decreased seriously (see update 07/11 23:59).
- He did not detect any serious change while i reported this (of course it was dark and he was reflecting the explosion vibrations he felt)
- I was unable to confirm him that it was a real decrease because the graphics we use are coming from the IGN website and IGN NEVER REPORTS RESCALING the graph. Most of the time it can be seen by white spaces or blue lines in the seismograms and harmonic tremor graphs, but at the time of reporting no visible change was detected. Since midnight it is obvious that the scale was adapted a number of times. We request @ IGN that they will indicate the rescaling actions in a separate log.

Update 08/11 08:35 UTC :
Just in from Joke Volta : much stronger jacuzzi action this morning

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Transit of seismicity per day. It can be seen below on the left under El Golfo, the current seismicity depth and power (green and violet) that the first injection of magma that produced the current eruption (mostly red). This makes me think that it is an injection of magma different from the first.

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El Hierro `Stain now covers 34 hectares


The Ramon Margaleff Oceanographic research vessel has returned to the area surrounding the underwater volcanic eruption off the coast of La Restinga, El Hierro. Scientists on board are believed to be analysing the composition of the gases and mapping the seabed around the vents to assess the current state of the eruption.


Back on the Island, the National Geographic Institute (IGN) monitored a total of 15 earthquakes overnight, measuring between 1.5 and 2.8 magnitude on the scale Richter.

The largest of the earthquakes was recorded at the opposite, Northern side of the Island, at 04.58 hours and had a magnitude of 2.8 degrees, in the northwest of the town of Frontera and at a depth of 20km.
The other earthquakes occurred to the northwest of Frontera, between 10 and 24 kilometers deep, with the most recent occurring at a magnitude of 1.9 magnitude and at a depth of 07.43 hours and at a depth of 17 km.

Meanwhile, the `Deimos-1Spanish research satellite observing the Island has recorded that the eruptive stain now has an approximate diameter of 650 mts and covers an area of 34 hectares (0.34 million square meters).

Marys recent Youtube post gives a thorough review of yesterdays activity (bearing in mind she is working in EST as opposed to GMT) >>>

(Canary Islands) El Hierro Eruptions Now 100 Meters High! CO2 and Harmonic Rising 11/08/ 2011

Yesterday a total of 65 earthquakes were recorded between, the strongest being measured at 06.19 at 3.0 on the richter scale off the coast of Frontera and at a depth of 21km.

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El Hierro 'landmass' just 70mts from surface

Spain's National Geographic Institute (IGN) who are observing the volcanic eruption off the town of La Restinga, on the southern coast of the Island, have reported further changes to the underwater phenomena.

Over recent days the bubbles on the surface above the fissures have changed to produced columns of steam, volcanic gases, lava and ash, thrown an estimated 20 mts into the air.

Yesterday scientists revealed that the water surrounding the eruption had been measured at 11 degrees higher than the average water temperature for coastal waters around the rest of the island.
Meanwhile, Scientists onboard the Ramon Margaleff Oceanographic research vessel have estimated that the solidifying mass of magma rising from the fissure erupting on the ocean floor is just 70mts away from reaching the surface.

As far as the northern coast of the island is concerned, the increase of seismic activity over recent days has heightened fears that a further eruption may occur around the epicentres of the many earthquakes, to the north of Frontera.

For all the Scientists, researchers, Military and Emergency personnel on the island, together with their many resources, there is still little information forthcoming with regards to what is happening on the island - or about to happen.

The Youtube clip demonstrates the force of the activity currently occurring off the coast of La Restinga >>>

ExplosiĂłn de gases y cenizas en El Hierro

quote:

Op woensdag 9 november 2011 12:02 schreef Frutsel het volgende:
[ afbeelding ]

BOOM!

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Op woensdag 9 november 2011 13:05 schreef Jumparound het volgende:

[..]

maar hoe groot... Kom met details fruts, anders is het gewoon het zoveelste monster-van-lochness-achtige foto

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Op woensdag 9 november 2011 13:06 schreef motorbloempje het volgende:

[..]

Ziet eruit alsof een dolfijn een scheet laat.....

quote:

Op woensdag 9 november 2011 12:02 schreef Frutsel het volgende:
[ afbeelding ]

BOOM!

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09/11/2011 @ 11:26 – The El Hierro underwater volcano eruption seems to have calmed down today as the ‘bubbling’ and ‘steaming’ effect with explosions and the spewing of magma has dissappeared since its spectacular show yesterday. Despite this news, there have been 18 earthquakes on El Hierro so far today, all overe 1.5 degrees Richter.

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Very Important Update 09/11 – 12:22 UTC :
- Scientists in La Restinga and Guardia Civil who is currently flying over the earlier jacuzzi location have reported that the vent has probably closed completely. The activity has completely stopped at the moment. The Roman Margaleff Oceanographic ship is now close to the eruption vent is is problably taking gas samples and water samples.
We expect to publish images soon.
The closure of erupting vents is a normal phase in this kind of activity. This does not mean that the volcano activity is completely over. If the volcano continues in the same pattern, the seismic activity may getting stronger again as the magnma trying to find his way to the surface has been blocked.

Update 09/11 – 11:30 UTC :
- There is a slowdown of the activity. A lot of pumice, but the activity active seaspots have subsided almost completely. Joke is now looking atthe Las Calmas sea at the Montańa Naos (the cliff 150 meter above the Las Calmas sea).
- The world is blind again ! The El Pinar webcam (see picture below) turned black.
- The owner of the La Restinga webcam is still working on a solution involving the authorities and Telefonica. Why do we have a bad feeling about this …

Data Update 09/11 – 11:20 UTC :
- 18 M+1.5 earthquakes occurred since midnight today
- strongest earthquake had a magnitude of 3.0 and occurred at 04:15 NW of Frontera.
- seismic activity is almost unchanged for many days now, the depths are still within the 17 to 23 km range and almost all epicenters are in the El Golfo bay.

quote:

Op woensdag 9 november 2011 13:41 schreef Frutsel het volgende:

[..]

Je hebt gelijk, ben benieuwd wanneer jouw eerstvolgende informatieve post komt

Maar goed, antwoord staat in post #172
en eronder...

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Op woensdag 9 november 2011 14:07 schreef Frutsel het volgende:

[..]

Dat is er alvast één

Dit topic openen is op deze oude kutpc bijna niet meer te doen

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Update 09/11 – 13:04 UTC :
The Roman Margaleff has been throwing a buoy near the eruption vent yesterday. The ship is now circling the area. What the ship is doing know can be called a calculated risk. We have to admit that the ship is doing great work in continuous sampling of the emitted gases and the water (he has been observed many times at the edge of the stain the last couple of days). As Patrick Allard was telling in this article before, the composition of the gases is predominant in calculating the risk for the population.
Update 09/11 – 12:41 UTC :
Picked up from the comments made below (Name and address known @ ER)
Cabildo de El Hierro and Telefonica are installing 2 webcams in La Restinga to enable people to follow LIVE the eruption events.
Cabildo de El Hierro y Telefónica ya están instalando 2 webcam en La Restinga para el seguimiento en directo del fenómeno eruptivo Twitter
If this message is confirmed, this is really good news, as Telefonica is the main telecommunications company in Spain and is maybe the only instance who is able to guarantee huge amounts of traffic.

quote:

Op woensdag 9 november 2011 14:41 schreef Frutsel het volgende:

[..]

Kijk maar, gewoon doorgaan.
ik vind het super dat je zoveel updates post

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Update 09/11 – 14:01 UTC :
- Joke has just reported that she had spoken to the technicians and the Cabildo (authorities). The technicians told her that the installation of the webcam was almost finished and that only the software had to be configured. The least that we can say is that this news is hopeful !
- Pevolca did meet at noon and as could be expected nothing new has been decided

quote:

El Hierro eruption quietens

The National Geographic Institute (IGN), who have been observing both the volcanic eruption off the coast of la Restinga, on the southern coast of El Hierro, and seismic activity off the coast of Frontera on the north of the Island, have reported further activity.


A further 18 earthquakes measuring over 1.5 on the richter scale were recorded between midnight and 09.00 hrs GMT, with the strongest being recorded at 3.0 at 04.15 hrs GMT in the El Golfo area of the coast of Frontera, at depths of 17 to 23km.

On the opposite side of the island, scientists on board the Roman Margaleff Oceanographic Research Vessel are still observing the las Calmas bay area in general. Following an increased level of activity over recent days, they are now reporting that, whilst the jacuzzi appears to have stopped for now and vents closed, this by no means suggests that activity has ended.

quote:

Op woensdag 9 november 2011 15:34 schreef Frutsel het volgende:

[..]

Zit jij zelf in die regio dan?

quote:

Eruption at El Hierro Creeping Towards the Surface

A brief update today on all the events at El Hierro – it looks like the eruption continues to work its way closer to the surface of the Atlantic as periodic explosions continue off the southern coast of the island. So far, there hasn’t been any sustained explosive activity that would make the eruption truly Surtseyan in nature, but the last few periods of heightened activity did see larger explosive “bubbles” in at the surface, some potentially as high as 25 meters (see above). The video of the activity clearly shows that the materials reaching the surface are very ash/tephra rich and in the photos of the chain of “jacuzzis”, you can see the clasts of volcanic debris floating (see below) on the surface. Some of the most recent estimates I’ve seen is that the vent is ~70 meters from the surface now, so close to that ~50 meter depth needed to truly get Surtseyan explosions to start occurring regularly. However, latest reports from El Hierro suggest that activity has subsided at the vents (via @teideano) – but government officials have still closed beaches near the eruption due to “toxic gases” (although the articles mentions copper sulfate as the gas, which is confusing to say the least).

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Daily traffic of seismicity in 3D from the beginning of the crisis. Ellipses are shown in the main groups of earthquakes: in cyan or purple, the events that occurred before the eruption (the first shot at a relatively low magma deep beneath the Frontera zone and Tanganasoga) the pre-eruptive seismicity immediately and eruptive elJulán and el Mar de Las Calmas, also in cyan. And finally, the seismicity for an alleged new injection of magma, the stronger and deeper in el mar de El Golfo that causes the current seismicity.



[bron]

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Update 09/22 23:10 UTC:
La Restinga webcam news ! : We know that the webcam stories are more disappointments than successes, but more good news is in the making. Todays HD-La Restinga webcam was a trial with a fixed picture. The EFE correspondent and Mr. Atilano have told Joke Volta that from tomorrow on a capacity of 90,000 people can be handled.
Update 09/22 23:05 UTC:
2 volcanic earthquakes have been felt by the people tonight. The first at 18:17 and the second, a 3.1 earthquake at 18:41.
Update 09/22 22:00 UTC:
Picture made by the helicopter crew of the Guardian Civil Involcan. It almost looks like a volcano but it is only the coloring of the water.

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NOTE AVCAN 313 - EARTHQUAKE ACTIVITY-VOLCANIC - IRON ISLAND - 10 November 2011-11:30 h peninsular - Seismic activity continues to moderate, moderate-low seismicity in el Golfo marine area and a very important signal of volcanic tremor in the Restinga area, which remains more or less stable. The magnitude of the earthquakes between 2.7 and 1.3. New earthquakes 12. Depths between 19 and 21km (and two to 16 and 18km and two at 22 and 23km). The day before yesterday 99. Yesterday 54. Now go 49. A total of 11,390 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

[bron]

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10/11/2011 @ 11:33 – El Hierro council to install professional webcams for the world to view the eruption live. This is after the huge demand for information from around the world. Telefonica are currently testing a system that will guarantee enough bandwidth to cope with the demand anticipated. More information and the URL will be released over the next few days.

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PEVOLCA call meeting of experts this afternoon

The National Geographic Institute (IGN) have reported how seismic activity on the Island of El Hierro was reported yesterday evening at 18.17 and 18.41 GMT, measuring 3.1 on the richter scale, with a further 8 quakes being registered between midnight and 10.00 Hrs GMT measuring between 1.5 and 2.7 on the richter scale and at depths of between 18-22 kms.


Observers also report that, following yesterdays decrease in activity, the `Jacuzziaction erupting from the fissures on the ocean floor of las Calmas, off the coast of la Restinga.

The National Research Council announced this morning that a specially invited number of scientists and experts from the fields of Volcanology, Oceanography, Petrology, Geodynamics, Geochemistry, Meteorology and Atmospheric and Geologic Hazards will meet this afternoon.
The assembly has been called in order to advise the committee for the Special Plan of Civil Protection and Emergency Response for Volcanic Risk in the Canary Islands (PEVOLCA) who will inform the appropriate authorities and public bodies as soon as a common agreement with regards to what is actually happening, or about to happen on the island has been made.

PEVOLCA also intend to try and standardise all of the scientific methodology that is being applied to allow for easier interpretation of the data being observed.

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Data Update 10/22 11:13 UTC:
- Harmonic tremor and frequency are showing still activity but with a limited number of bursts.
- Since midnight UTC the earthquake activity can be called weak compared to prior days. Only 8 quakes with magnitudes 1.5 or higher.
- Max. magnitude since midnight : 2.7.
- Shallowest earthquake being at a depth of 18 km.
Update 10/22 10:55 UTC:
Joke just arrived at Montańa Naos (Naos mountain) a viewpoint area 150 meter above sea level. She reports that a faint eruption zone is forming again, but without bubbles in the middle like we have seen the prior days.
Update 10/22 09:15 UTC:
The picture below was uploaded by Involcan (Instituto Volcanologico de Canarias) and shows the relation in between various parameters like : nr of volcanic earthquakes, the date when the eruption started and the CO˛ emitted before and after the jacuzzi or eruption action. The last 2 days are not included, so the graph ends with the strongest eruption phase explaining why the CO˛ values are that high. Clicking on the image will result in a larger picture.

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quote:

Op donderdag 10 november 2011 13:54 schreef Jumparound het volgende:
de webcam staat er!

http://www.ilovesantacruz(...)la-restinga/2011/11/

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quote:

Update 10/22 13:08 UTC:
- The French press starts to arrive at El Hierro but the activity has gone
- Joke reports that there is ZERO to see at the moment
- The Guardia Civil Involcan helicopter has just made his daily overflight (Involcan is taking gas samples above the vents see graph below) and came to greet the journalists at the viewing point
- At 11:30 the La Restinga city council met in El Pinar to discuss solutions how to survive this crisis
- Only 6 people are currently in La Restinga
- and the webcam he is till showing the image from yesterday. We hope that the La Restinga councel will do something about it this is truly bad publicity for El Hierro

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Update 10/22 13:49 UTC:
- Some of our readers have just asked us to make it clear that the HD-Webcam @ La Restinga (http://www.ilovesantacruz(...)la-restinga/2011/11/) shows only a still panorama picture. Like we said already in our 13:42 update, El Hierro authorities are missing a great chance to promote the island. The webcam was promised to be functioning today, but it remains a promise only. Joke Volta did her best to get it done, but she is more used to the tomorrow promise on this otherwise so peaceful island.
Update 10/22 13:46 UTC:
- Joke Volta has requested at the El Pinar authority to install waste bins at the viewing point @ the montańa Naos as people are staying there for many hours and have their food and drinks with them, but no place to put the garbage . Her proposal was well received.

quote:

Op vrijdag 11 november 2011 08:26 schreef byah het volgende:
Ga eind van de maand naar Gran Canaria, moet ik me al zorgen maken?

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quote:

Op vrijdag 11 november 2011 08:38 schreef Tokamak het volgende:

[..]

Ga naar het hoogste punt van het eiland en zet daar je tent op

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11/11/2011 @ 09:01 Scientists prepare for a new eruption, possibly to the north of El Hierro. After a period of calm came a 4.6 degree earthquake this morning, at 00:20 located to the north-west of El Hierro. This is the strongest quake to hit the island so far. Scientists are expecting a new eruption to take place and claim that data points towards a new eruption off the coast of Frontera, to the north-west of the island as this is where all the lastest earthquakes are being detected. So far today there have been 23 earthquakes over 1.5 degrees on the island, three of these have been felt by the islands population.

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Data Update 11/11 08:44 UTC:
- The 4.6 magnitude earthquake was also felt on the islands of La Palma and Tenerife
- we want to stress (before we get a number of questions about it) that this earthquake will have NO relation with the volcanoes on La Palma and Tenerife.
- Joke just told me that she sees NO sea jacuzzi from her house in El Pinar (400 m above the Las Calmas sea). Later today she will move to the viewpoint @ the Naos mountain (where the official journalists are standing)
- Joke is not a journalist of course, she is an artist, and became our volunteer El Hierro eyes while commenting in this website on what she saw. Gradually Joke became our human webcam (she invented the word herself) and reported to the thousands of daily ER readers. Just as many of our readers, she became fascinated by the volcano she is living up the last 25 years.

Data Update 11/11 00:55 UTC:
- a magnitude 4.6 earthquake happened in the El Golfo bay at 00:20 November 11. The depth was 21 km. This is one of the strongest earthquakes on El Hierro so far.
The earthquake was felt as a light to moderate shaking. If confirmed at 4.6 by IGN, the Los Roquillos tunnel maybe closed again. The epicenter of the earthquake was in the coastal El Golfo bay area.

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NOTE AVCAN 315 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - NOVEMBER 11 2011-11:00 h peninsular - Seismic activity remains high, with moderate seismicity in the marina del Golfo and a very important signal of volcanic tremor in the area La Restinga, which increased in amplitude and has become more unstable, presenting explosions. The magnitude of the earthquakes between 3.5 and 1.2. New earthquakes 29. Felt earthquakes 3. Depths between 17 and 22km (and three to 15, 15 and 16km and two at 23 and 23km). The day before yesterday 54. Yesterday 46. Now go 23. A total of 11,453 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

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Update 11/11 10:44 UTC:
- Joke reported that a new circle is showing from the higher areas of the island. She is now at the Naos mountain 150 meter above the Las Calmas sea. If something important will be seen there, our audience will know it within minutes.

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Update 11/11 10:44 UTC:
- Jose Manuel Soria, the candidate of the Partido Popular for the presidency of the Canary Islands (elections to be held on November 20), is currently campaigning at El Hierro and wants to visit Montańa Naos to have a view at the eruption area. He may not be aware of all the journalists he will find at this viewing spot
The evacuated people at El Hierro as well as the business sector are highly dependent on aid from the Canary Islands government.
- Paulino Rivero, e memeber of the PSOE, is the current president of the Canary Islands and apart of a lot of promises, only little has been done to help the people of La Restinga and Las Puntas. Mr. Rivera has now approved bills for direct aid to business owners employing personnel.
- The central government has now given a period of 10 days to fill in the necessary documents to obtain aid.

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11/11/2011 @ 12:40 Two webcams are to go live today on the island of El Hierro. One will point at the eruption area in the Mar de Las Calmas sea and another one will point in the general direction of the harbour of La Restinga. Two more webcams are due to be installed in the north, off the coast of Frontera where there is increased activity underwater and a new eruption is predicted. This comes after an agreement between the El Hierro council and Telefonica.

quote:

The El Hierro Webcam soap (continued)
Diario El Hierro writes just before noon that the Cabildo (El Hierro board) and Telefonica will announce today the long awaited webcam overlooking the Las Calmas sea. The obscure comment currently on the page will hopefully be removed.
+ we will have 2 webcamas ready, 1 in the north (El Golfo) and 1 in the south (Las Calmas sea).
Instead of just putting the device to work, both parties have called a press conference at 13:30 local time today, to tell what we probably will see.

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El Hierro : Largest Earthquake Hits This Morning

IGN scientists observing seismic and volcanic activity on the Island of El Hierro recorded the strongest earthquake to date in the current earthquake swarm - measuring some 4.6 on the richter scale. The activity was measured at a depth of 21km at 00.20 GMT, with an epicenter in the El Golfo bay, off the northern coast of the Island.

The tremors were felt as far away as La Palma and Tenerife, which has heightened concerns that any seismic activity on the former Island "could" have an effect on the Cumbre Vieja Volcano. Observers have concerns that a collapse of the Volcano would cause a landslide, which would in turn cause a tsunami that could potentially devastate much of the eastern seaboard of the US.

Sources on the island have reported that the only incident arising from the activity is a landslide which closed the HI1 road, which was closed for a number of hours until the debris could be cleared.
A further 21 earthquakes were recorded between 2.8 and 3.1 on the richter scale, all located off the coast of Frontera to the north of the Island, according the IGN.

Meanwhile, two beaches on the south of the island, Tacoron and Puerto Naos have been closed to the public due to a government worker being taken ill while measuring carbon dioxide levels.

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11/11/2011 @ 14:23 The director of the National Geographic Institute has said that they are expecting a possible double eruption to the north of El Hierro both underwater and on land, according to the latest data available to them.

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Update 11/11 13:19 UTC
- Diario de Avisos writes that IGN scientists have confirmed that an eruption in the El Golfo area is possible and that an eruption on the coast itself cannot be excluded. To make this happen, more powerful earthquakes are needed to allow the magma to the surface.
- Scientists have also said the the eruption in the La Restinga, Las Calmas sea area is still continuing although almost nothing can be seen on the surface.

quote:

Update 12/11 – 09:07 UTC :
- 13 volcanic earthquakes since midnight.
- NO earthquakes stronger than 3.0
- Harmonic tremor is still present with regular powerful bursts
- The lack of powerful earthquakes and the continuing strong harmonic tremor are indicating (on the basis of the recent activity) that a new vent might have been opened at a deeper location, not showing any jacuzzi or serious turbulence. The first eruption period had similarities with the present situation. Recent satellite images would certainly reveal this kind of eruption.

quote:

Update 12/11 – 12:36 UTC :
- Joke Volta sees from El Pinar the same than we can see on the webcam. Sometimes an active area and a few minutes later a flat sea. She will go to the "press viewpoint" later this afternoon. The "press viewpoint" is open to all public until the sun goes behind the horizon.

quote:

Update 14/11 – 14:40 UTC :
- Joke reports an increase of the temperature at the Naos mountain (ER : not necessarily because of the activity)
- She also sees stones ejected above the surface.
- The helicopter of the Guardia Civil and Involcan is flying over the see
- RTVE is also present (footage probably tonight on TV)

Update 14/11 – 14:24 UTC :
- Joke reports a strong sulfur smell at the Naos mountain. [Deze was de afgelopen dagen behoorlijk afgenomen.] The bus driver who took her there said that he saw some stones ejected out of the water.

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