Tirelessly updating Avalon on the El Hierro eruption.

[Hervé]

Strongest so far (no data):

For the day:

Frequencies spectrogram, the vertical streaks indicate "events (tremors/EQs)

Refresh your browser to get the latest traces

The continuously changing scales keeps compressing the earlier graphs to the bottom and to the left!

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

Refresh your browser page to get the latest graphs and picture.

Following the count of EQs as shown by the red bars (≥ 2.0) there definitely is a subsiding of the overall seismic activity as the trend continues:

As for the location of the most recent EQs (red dots), they remain in the El Julan Sea of Calm:

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

[Hervé]

Posted by randles (here)
Ooooooooooooooooh !!
Trying desperately to book a ferry to see that little gem

Posted by Amzer Zo (here)
Here is what Jose Luis Barrera is speculating about:

Source: https://youtube.com/watch?v=3YOs0zHVTZw

Well, until that happens or the ROVs return some pictures of magma coming out; what seems the best bet for now is that the magma chamber has only been releasing... gas.

However, because of the uncertainty, the authorities have rightfully taken the safer way and got everybody out.

[randles]

The oceanographic vessel of the Canary Islands arrived in El Hierro to start today the first sampling of water where the big emerging green stain that grows to La Restinga and south of the island. Scientists claimed yesterday that the eruptive process had stabilized the last 24 hours.

The green spot that extends over the Sea of calms and that since Thursday was to be seen not only much of the southern coast of El Hierro but from space is acquiring, by the day, although larger, "because ocean currents. "Researchers at the National Research Council (CSIC) and the National Geographic Institute (IGN) said yesterday through a statement released around seven in the evening, the eruption of El Hierro process "remains stable" since within 24 hours "has maintained a low seismic activity, dispersed in the environment of the mid-west, and continues the same trend in the deformation of the ground."

The non-appearance of the researchers, for the first time since the beginning of the volcanic crisis in El Hierro, coincided with the arrival yesterday of Professor Ignacio Lozano ship the Canary Institute of Marine Sciences (ICCM), which starts today making data and samples in the area over the stain. The instruments carried on board (Niskin bottles to collect water, and a multiparameter probe) will reveal the variations that may have occurred on parameters such as sea temperature, salinity, turbidity, dissolved oxygen or chlorophyll of water in the area where the stain.


Carlos Barrera, coordinator of the research team, which will consist of six researchers from various agencies, said yesterday that the results obtained from sampling could "have evidence of the depth" to which may be the eruptive fissure but that "in no case" will know "what makes up the stain."


Precisely the composition of the stain and its origin is what is creating the most controversy among different scientific family are studying the phenomenon and can not be resolved until next week's arrival at the island the ship from the National Oceanographic Institute Ramon Margalef, equipped with an underwater robot camera. CSIC researchers claim that the magma is already flowing, but others, mainly related to ITER, estimated that the coloration of the water are only causing gases (fumarole submarine).

[Hervé]

There you go, beautiful shot:

Compared to:

[Hervé]

A closer look at the "green" plume from yesterday:

Source: https://youtube.com/watch?v=3LzioTeVqGo

[randles]

Image sampling boat this morning where is the big stain

Watching the boat


Today, Saturday, El Hierro hopes further information on what is really happening in the depths of La Restinga, a fishing village whose fleet is grounded since Tuesday, and where people do not know what future awaits. Losses in La Restinga, a town closed under lock and key, are innumerable.

Indeed, these new data on the eruptive process can facilitate the oceanographic ship that arrived yesterday tp El Hierro to start today first sampling of water where the green staining is. And, according to data gathered by the Diario El Hierro it is growing considerably.


The ship, Professor Ignacio Lozano has bottles 'Niskin', to collect water, and a multiparameter probe, which will reveal the variations that may have occurred on parameters such as sea temperature, salinity, turbidity, dissolved oxygen or chlorophyll of water in the area where the stain is.

[randles]

Image of smoking (small black colored rocks that appear above the sea)


Sergio Gutierrez, Tecorón, El Pinar (15.10.2011. 14:43 pm)

The president of the Cabildo de El Hierro, Alpidio Armas, just confirmed they have found magmatic material (smoking pyroclatics) two kilometers from La Restinga. "evidence of a volcanic eruption," he said. "There is no doubt-he added, that there is, no further testing needed, He added that speculation about gases has gone The Presient said, "They also now know that there's a volcano under there, a mile away".

The Cabildo has told reporters that at that depth, there is no danger for the population. "However, the Civil Guard has tightened controls in the area and established a new perimeter up to about two miles from the intersection of Tacorón, and will remain to monitor the area.

Thus, the volcanic eruption in waters south of the island of El Hierro is already visible on the sea, where you can see at a glance material as a result of the effects of the volcano.

[randles]

Newscast
RTVE.es 15.10.2011

The volcano off the island of tp El Hierro has erupted magma and errupted just two miles from the coast, as reported by Álgela Alcover, TVE. The council has confirmed the news and says there is no risk of explosion.

However, the authorities have asked TVE team leave the area for safety. They are evicting residents of La Restinga and have asked the research vessel to return to port.

Source: https://youtube.com/watch?v=CXu29FtKdfQ

The appearance on the sea surface from a mixture of gases and magma, known as pyroclastic flows, has forced the closure of the entrances to the port of La Restinga and the prohibition of flying helicopters and airplanes in the area.


Epicenter of Eruption IGN

The pyroclastic flow is a mixture of gases and solids ejected during the eruptions of volcanoes that form pyroclastic lava flows, also called "burning clouds".

This compound is produced when The Presient said, with high content of dissolved gases (eg dioxides, sulfur or water vapor) is cooled and decompressed when they reach the surface during a volcanic eruption.

No risk to the population

El Hierro Cabildo president, has confirmed that the magmatic material has been detected at two kilometers from the coast of El Hierro, which corroborates the existence of an underwater volcano off the port of La Restinga.

He added, that the material is due to a magmatic eruption underwater to 900 meters deep. The president said that there is No risk to the Population

[randles]

And here it is, video of the smoking stones that Polly is coughing up !!
I do hope that Amzer Zo has a better description of this than me

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

[randles]

Image of the zone today

The Civil Guard reinforces its presence in El Hierro

DIARIOELHIERRO.ES, El Pinar (15.10.2011. 17:24 pm)

The Civil Guard has increased its presence on the island of El Hierro in order to assist in maintaining public safety, the protection of people and goods, and in every case in support of the population, reported a Civil Guard statement.

Thus, to develop this work so far has shifted to the island 7 ATVs Rural Safety Group (GRS) No 8, 2 terrain vehicles scuba Command Communications - 2 IDR belonging to the Command of Santa Cruz de Tenerife, 1 GATEPRO belonging to the Command of Las Palmas, 1 IDR - 1 and 3 GATEPRO INMARSAT satellite telephones belonging to the Telecommunications Service of the Directorate General of Civil Guard.

Material has also been taken to ensure specific transmission autonomously as well as panel material Underwater Civil Guard (GEAS) with a Zodiac boat of 11 meters, 1 compressor and 5 diving equipment.

In turn, also sent is a helicopter of the Air Service of the Guardia Civil in the Canary Islands which has regularly flown over the area to assist in the operation from the onset of seismic activity.

The Civil Guard said that the displaced help must include personnel assigned to the top job. Already sent into Valverde, (35 troops), 20 components of the GRS No. 8 in command of a lieutenant of the unit and provided with suitable material, as well as 12 members of the Public Safety unit Command (USECIC).

Friday saw the arrival of Civil Guard Patrol Pico Teide Provincial Maritime Service, with five crew for control and monitoring functions of the maritime area which is prohibited to navigation established by the Maritime Authority of Santa Cruz de Tenerife , covering a defined area of the sea. This boat has a provisional berth in the port of Stake

In addition to material and personnel that the Guardia Civil has already moved to the island, awaits activation, if necessary, component of the Group of Mountain Rescue and Intervention (Greim) functional unit and components NRBQ Group transmissions Command (ITAG).

[randles]

The Civil Guard has tightened security in the area due to the risk of eruption.

Sergio Gutierrez, DiarioElHIerro.es, Valverde (15.10.2011. 17:52 pm)

The eruption detected on Saturday in the waters of El Hierro has a focus at 2.4 km from the coast of La Restinga and 150 meters deep in the sea, explained in a press conference on Security and Emergency Director of the Canary Islands Juan Manuel Santana.

In response, the Canary Islands Government has decided to raise the emergency situation in La Restinga a red light, Level 1, in which, in addition to the mandatory evacuations, mobilized the necessary resources for intervention activities and logistics. This was transmitted by Pevolca in an address to the people of La Restinga, which must follow closely the recommendations of the authorities and members of civil protection.

As is known, the researchers IGN-CSIC, spotted at the inspection carried out from a helicopter in the header area of the spot, about 2,400 meters from the nearest point on the coast, numerous steaming lava fragments in suspension , in an area of approximately 100 meters and surrounded by rows of gas bubbles. Also they were able to observe a change in the color of the headwaters, and this is more dark and of a turbulent aspect. This would mean that the eruption is occurring within 150 feet deep.

With this information, the direction of the Plan gave the order to close off access to the village of La Restinga, and prohibit air and sea traffic in the area. In this sense, Professor Ignacio Lozano vessel ceased research and returned to port.

NO GREATER RISK

From the direction of Pevolca they want to convey to the people that this situation does not imply increased risk for them, since they have already taken "at the time" proper precautions, Pevolca have also summoned the media to a hearing with the spokesmen of scientists so that they can clearly define the characteristics of this phenomenon. This will be held at the Headquarters in Cecoi in Valverde, at 19:00.

Scientists at the National Geographic Institute (IGN) and National Research Center have confirmed that this is a fissure submarine eruption in shallow waters.

[randles]

http://www.emergenciaselhierro.org/




La Restinga
El Pinar



Applies to the rest of the Island of El Hierro



prensa@el-hierro.org

AVISO URGENTE

IGN-CSIC scientists confirm a fissure eruption type submarine in shallow waters

The Canary Islands government rises to the emergency red light, level 1
Residents should be reassured because preventive measures have been taken

Scientists at the National Geographic Institute (IGN) and National Research Center have confirmed, in the afternoon today, the leadership of the Civil Protection Plan for Volcanic Risk, a fissure eruption type submarine in shallow waters.

In response, the Canary Islands Government has decided to raise the emergency to red light, Level 1, in which, in addition to the mandatory evacuations, mobilized the necessary resources for intervention activities and logistics. This was transmitted PEVOLCA address to the people of La Restinga, which must follow closely the recommendations of the authorities and members of civil protection.

As is known, the researchers IGN-CSIC, spotted at the inspection carried out from a helicopter in the header area of the spot, about 2,400 meters from the nearest point on the coast, numerous steaming lava fragments in suspension , in an area of approximately 100 meters and surrounded by rows of gas bubbles. Also have observed a change in the color of the headwaters, and this is more dark and turbulent aspect. This would mean that the eruption is occurring within 150 feet deep.

With this information, the direction of the Plan gave the order to close off access to the village of La Restinga, and prohibit air and sea traffic in the area. In this sense, Professor Ignacio Lozano vessel ceased research and returned to port.

From the direction of PEVOLCA they want to convey to the people that this situation does not imply increased risk for them, since they are already taken "at the time" proper precautions, and summons the media to a hearing with the spokesmen of scientists so that they can clearly define the characteristics of this phenomenon. The headquarters of this will be in CECOI in Valverde, at 19:00.

[randles]

The mayor of El Pinar (right)
El Pinar, social and economic emergency

Sergio Gutierrez, El Pinar (15.10.2011. 18:37 pm)

The Municipality of El Pinar de El Hierro has just unanimously declared the state of social and economic emergency to the latest developments in the municipality with the evacuation of about 400 people from La Restinga on Tuesday, a fact that has led to a unprecedented economic stagnation.

With El Pinar, That now makes two of the three existing municipalities on the island of El Hierro (La Frontera did on 10 October) that are in this situation following the eruption process.

In this sense, the mayor of the Municipality of El Pinar de El Hierro, Juan Miguel Padrón, said the House has agreed to address the government and state Canary Islands, the European Community, to, MPs or MEPs canaries, the City Council of El Hierro and ask support.

Juan Miguel Padrón, however, sent a message of comfort to the inhabitants of the municipality and said that "El Pinar is not going to evacuate, I want to make that very clear to the neighbors they will not be evacuated," the mayor stressed.

[randles]

Polly meets the President, and a couple of dead fish..

Source: https://youtube.com/watch?v=4Lt2p12n6RE

[randles]

Goodnight Avalon

I hope that Polly is feeling better in the morning

[Flash]

Good night randles and thanks to keep us informed.

Buenas noches a todo de las islas de Canarie tambien.

[Hervé]

Well, I am glad Randles left something to reverse engineer from the GoogleTranslate gobbledygook of the news-speak rendering of scientific babblings back to, somewhat, understandable English...



Ramon Ortiz, head of Centro Superior de Investigaciones Científicas (CSIC)

SPECIAL SEISMIC CRISIS - 15/10/2011 (21:02 pm)
BY RAMON ORTIZ

''If the process continues there will come a time when a new island is born''


The head of the Centre for Scientific Research (CSIC), Ramon Ortiz, said in Valverde on Saturday that if the eruptive process continues its course,''there will come a time when the lava will come out and create a new island.''

If a new island is born with the eruption at El Hierro ... what would you name it? Join us on Facebook of DIARIO EL HIERRO [DAILY IRON]. CLICK HERE.



Sergio Gutierrez, DiarioElHierro.es, Valverde (15.10.2011. 21:02 pm):

The head of the Centre for Scientific Research (CSIC), Ramon Ortiz, said on Saturday in Valverde that if the current eruptive process continues there will come a time when the lava will come out and create a new island," he said. This is one of the hypotheses that scientists are now following after observing the evolution of the eruptive phenomena in the last 24 hours, although other scenarios are not ruled out.

In this regard, Ortiz said that what is happening right now in the sea of ​​La Restinga is that "the magma produced gases, the gases reach the surface and generate the colored patches," he said.

He explained that, in the first stage, which effects have been seen today, is the extrusion of "lava blobs which are gas-filled and once the gas escapes they sink." In a second stage, according to Ortiz, "a beautiful column of white steam can then be seen" which will then be followed by the third phase to be observed "black colored explosions known as rooster tails." Finally, "the growth of a small island that will flow lava in fountain jets," would then be witnessed.

Ramon Ortiz also said that the diameter of the mouth of the volcano should be about one meter in diameter and it has caused a bulging on the island tip of about five centimeters. He said that the eruption will be observable when it comes up to about 60 meters deep.

As for the time it will take for all of this to take place is difficult to quantify, "you can ask, but the volcano has not told me yet," Ramon Ortiz quipped.

However, Ortiz said that everything depends on how deep the eruption process might be at this stage, if it can not just accumulate any more lava because the lava blobs rise to the surface and sink; if this happened then we would know that the eruption would not go any further and everything returns to normal life."

NO DANGER TO THE PEOPLE

According to Ramon Ortiz, after the evacuation of La Restinga, "the danger for the inhabitants is nil, unless they get where they should not." Accordingly, the scientist rules out that the eruption would arrive at La Restinga, "if it did, it would cause minor damages such as breaking a couple of windows or a few rooms filled with ashes or a roof," he said.

Also, Ramon Ortiz ruled out, in principle, an eruption on land, but do not rule out large earthquakes (about magnitude 4 on the Richter scale).

For his part, Director General of Security and Emergency, Juan Manuel Santana, announced that there will be a further meeting of the Steering Committee Pevolca, this Sunday, the 16th, which will be attended by the President of the Government, Paulino Rivero, and the director of Plan and Minister of Economy, Finance and Security, Javier Ortiz. The meeting will take place at 13:00 pm in the City of El Pinar.

[Hervé]

Now, for these lava blobs that float up and then sink, from Wikipedia:



Pumice
From Wikipedia, the free encyclopedia


Specimen of highly porous pumice from Teide volcano on Tenerife, Canary Islands. Density of specimen approximately 0.25 g/cm3; scale in centimeters.


Pumice /ˈpʌmɨs/ is a textural term for a volcanic rock that is a solidified frothy lava typically created when super-heated, highly pressurized rock is violently ejected from a volcano. It can be formed when lava and water are mixed. This unusual formation is due to the simultaneous actions of rapid cooling and rapid depressurization. The depressurization creates bubbles by lowering the solubility of gases (including water and CO2) dissolved in the lava, causing the gases to rapidly exsolve (like the bubbles of CO2 that appear when a carbonated drink is opened). The simultaneous cooling and depressurization freezes the bubbles in the matrix.

Properties


Illustrates the porous nature in detail.



Rocks from the Bishop tuff, uncompressed with pumice on left; compressed with fiamme on right.



A 15 centimeter (6 inch) piece of pumice supported by a rolled-up U.S. 20-dollar bill demonstrates its very low density.


Pumice is composed of highly microvesicular glass pyroclastic with very thin, translucent bubble walls of extrusive igneous rock. It is commonly, but not exclusively of silicic or felsic to intermediate in composition (e.g., rhyolitic, dacitic, andesite, pantellerite, phonolite, trachyte), but basaltic and other compositions are known. Pumice is commonly pale in color, ranging from white, cream, blue or grey, to green-brown or black. It forms when volcanic gases exsolving from viscous magma nucleate bubbles which cannot readily decouple from the viscous magma prior to chilling to glass. Pumice is a common product of explosive eruptions (plinian and ignimbrite-forming) and commonly forms zones in upper parts of silicic lavas. Pumice has an average porosity of 90%, and initially floats on water.

Scoria differs from pumice in being denser. With larger vesicles and thicker vesicle walls, it sinks rapidly. The difference is the result of the lower viscosity of the magma that forms scoria. When larger amounts of gas are present, the result is a finer-grained variety of pumice known as pumicite. Pumice is considered a glass because it has no crystal structure. Pumice varies in density according to the thickness of the solid material between the bubbles; many samples float in water. After the explosion of Krakatoa, rafts of pumice drifted through the Pacific Ocean for up to 20 years, with tree trunks floating among them.[1] In fact, pumice rafts disperse and support several marine species.[2] In 1979, 1984 and 2006, underwater volcanic eruptions near Tonga created large pumice rafts, some as large as 30 kilometres that floated hundreds of kilometres to Fiji.[3]

There are two main forms of vesicles. Most pumice contains tubular microvesicles that can impart a silky or fibrous fabric. The elongation of the microvesicles occurs due to ductile elongation in the volcanic conduit or, in the case of pumiceous lavas, during flow. The other form of vesicles are subspherical to spherical and result from high vapor pressure during eruption.



Uses

Pumice is widely used to make lightweight concrete or insulative low-density breeze blocks. When used as an additive for cement, a fine-grained version of pumice called pozzolan is mixed with lime to form a light-weight, smooth, plaster-like concrete. This form of concrete was used as far back as Roman times. Roman engineers used it to build the huge dome of the Pantheon and as construction material for many aqueducts.

It is also used as an abrasive, especially in polishes, pencil erasers, cosmetic exfoliants, and the production of stone-washed jeans. "Pumice stones" are often used in beauty salons during the pedicure process to remove dry and excess skin from the bottom of the foot as well as calluses. It was also used in ancient Greek and Roman times to remove excess hair.[4] Finely ground pumice is added to some toothpastes and heavy-duty hand cleaners (such as Lava soap) as a mild abrasive. Pumice is also used as a growing substrate for growing horticultural crops.

[Hervé]

As for the "Rooster Tails" Ramon Ortiz mentioned in the above article, here are examples from Iceland at the end of this video:

Source: https://youtube.com/watch?v=jZdeavURhk8

[Hervé]

Well... El Hierro has now 10,077 tremors officially logged....

Meanwhile, this thread has enjoyed over 35,000 viewings....

Thank you for your support and for dropping by!

thank you.......