Tirelessly updating Avalon on the El Hierro eruption.

[Hervé]

Polly’s* latest:

Strongest so far (no data):

Whenever they get back online...

For the day: :

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

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.

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

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For the last 10 days, it now shows whatever Polly is up to as far as seismic activity is concerned:

GPS solutions from IGN

GPS Stations location:

Location of the EQs since January 1st,2012:

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

* : Polly was so named from the “polycephalic snake” look of the initial cumulative energy graph (see post # 327).
The name became most appropriate when the eruption from multiple mouths/vents/cones/heads started to develop.

[Hervé]

Strongest so far (no data):

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Strongest so far (2.7 at 22:34, -20Km, W El Pinar):

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Strongest so far (2.1 at 07:14, -19 km, W El Pinar):

They seem to have a formatting bug for the moment...

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

The stones of the El Hierro eruption, the most radioactive in the world

From: http://www.diariodeavisos.com/2012/08/04/actualidad/las-piedras-de-la-erupcion-herrena-de-las-mas-radiactivas-del-mundo/

RUBEN DARIO GARCIA LEON (AP) | Santa Cruz de Tenerife
Antonio Darwich, physicist, professor at the Department of Soil Science and Geology at the University of La Laguna; told EFE that the stones that surfaced as a result of the volcanic/earthquake crisis which affected the island of El Hierro last year are the most radioactive in the world.

Antonio Darwich also said in an interview that the restingolitas are unique in the world in terms of the relationship between two radioactive elements such as thorium and uranium, adding that these statements can be made after the results of the chemical and radiological analyses on those rocks.

The uranium concentration is in the white part of the stone, which forms the core and is chemically very different from the outer zone, which is black.

The white part has indices of uranium that are at least six times greater than those found in any other volcanic rock of the Canary Islands, and are probably the most radioactive in the world, Darwich said Antonio.

By comparing the amount of uranium and thorium in these stones thrown by the submarine volcano of El Hierro, it is found that it is unique in the world, as it will normally be between 0.1 and 0.2 times for the latter/secondary[?], and in the case of the said restingolitas, these are three times more than background/primary[?].

This result indicates that this material that has been subjected to a hydrothermal process, the researcher said, adding that the world may have four or five rocks that have a similar composition.

However, in the crust or outside of the rock emerged in El Hierro, levels of uranium are different, which means that the origin is different for the inner layer [white core portion], he explained.

Regarding the possible origin of the inside, scientists from the Institute of Volcanology of the Canary Islands (Involcan) collaborating with the University of La Laguna for this study funded by the Council for Nuclear Safety indicate that there are several possibilities.

Antonio Darwich said that in the area where the underwater eruption occurred, and even El Hierro is a young island, the seamounts are Cretaceous, the time of the dinosaurs, and noted that the white coating is material rather old and might have at least one hundred thousand years[?].

The source of the whites is hydrothermal, which means that some fluid has pumped uranium into the area of El Hierro and it is noteworthy that this layer appears to be exhausted in a few weeks, said Antonio Darwich.

The inside of the said restingolitas also could come from the ocean floor in Africa, or slips of the island of Tenerife, and even ancient eruptions material, so that opens a new study on the subject, said Antonio Darwich.

This scientist was concerned that there has been a plundering of a rock that is unique in the world, because there are few samples of this stone and even if a high concentration of uranium is not dangerous since the amounts of the radioactive element is not significant.

Antonio Darwich said it is "absolutely" a rare stone due to its uranium content and added that until the appearance of this rock the greatest concentration of this element in the Canaries occurs only in the Tindaya mountain on the island of Fuerteventura.



*********************************************************
For those of you who have steadily followed this thread, you would know by now that the white cores of the Restingolitas with a high silica content and which generated the "Rhyolitic explosive" scare in the beginning are in fact of sedimentary origins. In other words, the white component of these Restingolitas are magmatically reworked/melted sediments as first suggested by Juan J. Coello Bravo (SOBRE EL ORIGEN DE LA “RESTINGOLITA” pdf)

and later confirmed in a published collective paper of which Juan Carlo Carracedo was one of the author (Floating stones off El Hierro, Canary Islands: xenoliths of pre-island sedimentary origin in the early products of the October 2011 eruption; pdf, V.R. Troll et al., http://www.solid-earth.net/3/97/2012/se-3-97-2012.html):

Fig. 6. Sketch showing the internal structure of El Hierro Island. Ascending magma is interacting with the pre-volcanic sedimentary rocks, and we suggest that the early floating stones found at El Hierro are the products of magma-sediment interaction beneath the volcano. Pre-island sedimentary material was carried to the ocean floor during magma ascent and eruption and melted and vesiculated while immersed in magma to develop a pumice-like texture (“xenopumice”). Once erupted onto the ocean floor, these xeno-pumices separated from the host lava and floated on the sea surface due to their high vesicularity (i.e. their low density).

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

The above interview of Antonio Darwich relating the uranium content of the white (sedimentary) core of these Restingolitas would just be one of those peculiar oddities of nature if it weren't for what has been recalled -- by 1000s of individuals -- to have happen to Earth and that specific area some 75 million years ago... at the time of the dinosaurs:

Here are the relevant portions of a video transcript ( see this post <-- for the video with whole transcript, glossary and context):

Posted by Amzer Zo (here)
[...]

People were ferried in here by the billions and the billions and the billions and they were ferried in here with boxes and they were put in boxes and stacked around and the people who were on this planet already, just caught it in the teeth, nobody bothered to pick them up. They just shot their administrators from guns and shot their control points out and they took these people in boxes and so forth and they dump them and then they set off hydrogen bombs on the top of each primary volcano there is on this particular planet and when they blew up , it blew the thetans into the air and after the bomb, an electronic ribbon which also was a type of standing wave was erected over the area. The tremendous winds on the planet blew every thetan there was straight in to those particular vacuum zones which had been created.

[...]

... they were then boxed up again and the boxes were mixed so that – there were two assembly areas, one was Las Palmas and the other was Hawaii and in these two assembly areas, they took samples from each volcano area and put it in little boxes. They have an assembly line and at Las Palmas it once was down the main street of Las Palmas. More darned accidents on that main street than you can shake a stick at. One of our captains was feeling rather queasy until I told her, “Well the old assembly line of R6 is just 25 feet from you as you arrived here on the seaway.” That blew the charge.


[...]

There were 250 billion on this planet, the name of this planet was Teegeeak and this is known as the “bomb-place” and this is the “evil place.” This is the place [?pretty much all of it?] got smashed.

[...]

You wonder today where you see large areas of where their alleged volcanic action has been, those are R6 explosions, the remains of them. If you go down through many layers of civilizations, archeologically, you come to “green glass.” [<-- check it out]

[...]

... But, Incident Two has a volcanic explosion which follows the actual explosion as its picture. And it’s very tricked, very tricked up.

So that you actually – bunch of thetans and they get bombed, that is one, that is one of the explosions that is shown and there are several explosions shown in sequence so actually what happened was that the real explosion which is the guy boxed up in a box or he is walking around or all of a sudden all Loyal Officers that were caught here and so on, were chained on the top of buildings and so on and so when the bomb hit, why, they were pick up into the fantastic --100s of miles an hour, 1000s of miles an hour winds that come with gross, complete atomic explosion all over the planet and they were whirled into these terrific winds and so on.

Everybody on the planet was killed and about three days afterwards is actually when the implanters started operating.

[...]

Now, the net result of all of this, was to make a 75 million year vacuum. That’s as far as this part of the universe is concerned. You wonder why: “Why don’t… if there are saucers around, why don’t they land on this planet?”

This planet, traditionally, over the various zones and area has an evil reputation. Mutineers and deserters and that sort of thing were often dumped on this planet. They’ll often come here and refuge because they know nobody’s gonna come after them.

This planet is the planet of the evil repute and this sector of the universe has a very evil repute.

Now, all the data which you have that was set out seventy four fluff-fluff-fluff million years ago – almost seventy five – this catastrophe overcame this confederation and has just made it an unsavory part of this universe, to say the least.

About, well, relatively, we are almost in modern times -- 20 million years ago, something like that – somebody started a body line on the planet; it gradually worked through various areas of barbarism and once more, R6 tailored made it to be nothing but a caveman civilization.

[...]

... The dramatization of exploding a bomb is contained in R6 so sooner or later somebody is gonna smack this planet into a [?cock-hatter?]. That’s why I talk occasionally about having to get there with the mostest.

[...]

There you go...

Who would have thunk that these beautiful, black and white curiosities spit out of an El Hierro submarine volcano would lend strong supportive evidence that this planet we live on got completely and utterly nuked into a billiard ball at around the time of the dinosaurs?

[Hervé]

Strongest so far (2.0 at 19:41, -22Km, W El Pinar):

Whenever they get back omline...

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Strongest so far (2.0 at 11:41, -23Km, W El Pinar):


Whenever they get back online...

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Strongest so far (no data):

Whenever they get back online...

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Strongest so far (2.4 at 01:37, -3 Km, SW Frontera):

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Here is to illustrate the most probable origin of this "shallow" (at 3 Km depth) Mag 2.4 earthquake under the western portion of El Hierro and categorized as "stress related" on other sites:

Magma injection has generated a "doming" as documented by the GPS successive positions (see top of page diagrams showing a new increase of the "up" vertical component) and therefore "stretched" the portion of rock material above it in all directions.

This capping rock material or "lid," unlike a balloon which can stretch almost indefinitely due to its elasticity, cracks open when stretched out.

Depending on whether or not the cracks or fissures thus formed connect the magma chamber to the surface, an eruption can occur -- or not.

If these shallow earthquakes remain isolated incidents, there isn't much to worry about. However, if they increase in number and magnitude, then an eruption can be reasonably expected.

PS: The total cumulative inflation for HI 10 (El Julan) is from -6 cm to + 6 cm... that's 12 centimeters since the start of the recent swarm... quite a lot more than last year's.

[Hervé]

Strongest so far (1.8 at 07:11, -14Km, SW El Pinar):

Whenever they get back online...

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Strongest so far (no data):

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Strongest so far (2.0 at 12.43, -11Km, W Frontera):

Whenever they get online...

For the day: :

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

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.

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See top of page for the other auto-updating diagrams.

[Hervé]

The Mag. 6.3 in Northwestern Iran as recorded at La Gomera station:

There seems to be a discrepancy with the 12:34:35 UTC time reported by the USGS since the arrival time at La Gomera is 12:32 UTC ???

[Hervé]

Strongestso far (no data):

Whenever they get online...

For the day: :

Frequencies spectrogram, the vertical streaksindicate “events” (tremors/EQs) whereas the horizontal ones reflectvolcanic/magmatic activity:

From Wikipedia: AHarmonictremor is a sustained release ofseismicand/or infrasonic energy typically associated with the underground movement ofmagmaand/or venting of volcanic gases from magma. Being a long-duration continuoussignal from a temporally extended source, a volcanic tremor contrastsdistinctly with transient sources of seismic radiation, such as tremors thatare typically associated with earthquake and explosion.

Refresh your browser page to get the latesttraces.

See top of page for the other auto-updatingdiagrams.

[Hervé]

Strongest so far (2.3 at 10:35, -19Km, SW El Pinar):

Whenever they get online...

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

Strongest so far (no data):

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.

[Hervé]

The squigle on the hour 3 line above corresponds to the Mag. 7.7 (upgraded from 7.3) which occurred north of the Kuril islands and shown as recorded at the Gran Canaria station here:

MAP7.7 2012/08/14 02:59:42 49.784 145.126 -625.9 Km SEA OF OKHOTSK

Quite a very deep one.

[avid]

The LISS has gone mad again!!!

[Hervé]

Strongest so far (no data):

Whenever they get online...

For the day: :

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

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.

Refresh your browser page to get the latest traces.

See top of page for the other auto-updating diagrams.