Volcano watch 2011

The latest -

11/10/2011 20:42 – Joan Martí, a researcher at the CSIC (Instituto de Ciencias de la Tierra) and secretary of the ‘Asociación Internacional de Vulcanología’ (International association of vulcanology) has stated that “As the magma approaches the coast of El Hierro, it could trigger an explosive eruption if it occurs at a depth of less than 200 metres but would not be dangerous if appropriate safety measures are taken”. It is thought that the magma could be following a fault under the sea bed which is known to run underneath the island and could currently be looking for another way to escape to the surface. Scientists have observed that the magma is currently moving towards the centre of the island.

Be Safe Everyone!

reply to post by zenius


So much prettier than an electronic one isn't it.

Not quite sure how I would get to 'hear' that in Audacity however!

New updated blogg thread by jon Friemann for those of you interested in following events there

www.jonfr.com...
Rainbows
Jane

reply to post by PuterMan




www.01.ign.es...

Well for once I can state pretty confidently that IS harmonic tremor. See the bands? But what is interesting to me is the 1 Hz, almost exactly, center frequency of that tremor. That's pretty darn low for HT isn't it? I thought HT occurred mostly around 2 to 5 Hz? Well not this one.

Which then raises the question of what it might look like, and what frequency, at a place like Yellowstone or Toba.

Puterman, I don't suppose you have access to any raw data at Hierro, do you? Audio files of that SHZ signal would be very interesting.

Also, that HT lasted for TWO DAYS!!!

reply to post by TrueAmerican


No I have been trying to get data. Even emailed them but no response so far.

Actually I believe that to be volcanic tremor not harmonic tremor since it is so low and the banding is not on the harmonic frequencies.

reply to post by PuterMan


Well, whatever it is, it was pretty darn powerful. You seen the spectrals over the last two days, and webicorders?

I mean that thing kept the webis near clipped out. CONSTANTLY.

I have been following the posts but
not replying as I am more into learning
about volcanos than knowing about them.
Thanks all for the great information
and links provided. I see this one is
a bit of a puzzler. I just hope everyone
evacuated continues to stay away until
it is more known what is going on.

Most recent image:



Calmed down, but still active. How does this compare to prior activity?

Answering my own question:



The plot form the 10th.

Iceland's scientists warn Katla volcano activity increasing

Link
Link

"clusters of small earthquakes are being detected around Katla, which means an eruption could be imminent, seismologists say. The earthquakes have been growing in strength, too. After a long period of magnitude 3 tremors, a magnitude 4 quake was detected last week.

It is definitely showing signs of restlessness," said Einarsson, a professor of geophysics at the University of Iceland.

Teams of seismologists and geologists at the university are tracking the spike in seismic activity and working with disaster officials to prepare communities near Katla like Vik, a small town of some 300 people that is flanked by black sand beaches.

Civil defence authorities have been holding regular meetings with scientists. Disaster officials have also drafted an evacuation plan and set aside temporary housing, but many fear they may have less than an hour to evacuate once the volcano erupts."

Read more: www.ctv.ca...

So Katla is finally making her move. If we all recall the hoopla over Eyjafjallajokul's ashy fallout last year, several here on ATS thought that it was only a matter of time before Katla spoke up. Seems she now has things to say.

Debate away folks...

reply to post by palg1


Katla was indeed rumbling quite a bit for a while, but the last several days have been very calm. I found ATS last year through friends of mine who were watching the big E eruption, and I have been tracking Iceland ever since.

I found your article to be interesting, especially the part about the locals saying that Katla does not give much warning.

Latest seismic info for katla:
en.vedur.is...=table

edit - wanted to add this link as well...Spacedman who is on that thread a lot lives there and provides some great info on seismic activity throughout his country

www.abovetopsecret.com...

Recent spectra for El Hierro:



Looks like it is throttling down.

What are the occasional lines that run vertically and go all the way to the top of the lower graph?

reply to post by jadedANDcynical


Those yellow lines are small earthquakes.

About that Katla article.
It's just fear mongering combined with stuff that has already been discussed a hundred times.
Katla will erupt one day, that's for sure, but it's not going to be today or tomorrow or next week.
There has been some swarms in the past weeks but none of them have lead to that big eruption the author is talking about. It could although have been an sign but there was no eruption.

The difference between 100 years ago and today is that if an eruption at katla/laki/Hekla/Torfa/... happens we would be immediately informed and we would know what's going on. With we I mean everyone on the planet and the governments would be able to inform the people about what to do and what not to do.

Originally posted by Nidwin
With we I mean everyone on the planet and the governments would be able to inform the people about what to do and what not to do.

Predicting the eruption at Katla is still going to be rough with all that ice on it. One of the eruption precursors- gas emissions- has got to be tougher to detect under a glacier. The same for magma chamber inflation- the glacier could affect GPS readings there too. So the quake swarms may be all the warning they get.

And I could see how understandably they are nervous with the quake swarms- one of which reached a 4+ mag. Wonder what that would have been with no glacier on it? A 5+? In which case all those quakes could really be stronger down there and the thing is getting ready to go any minute. Ice in that quantity changes the game a bit.

In El Hierro

It seems that the eruption(?) has reached the island ....

www.publico.es...

reply to post by Kellys


Is there an english version?

I used Google to translate the page and after reading it again I think it is saying that the discoloured water from the underwater eruption has reached the island ...

My bad

reply to post by crappiekat


Google Translate

The volcanic spot and makes landfall in El Hierro. RelacionadasLos JMNoticias scientific data point to a new eruption in El Hierro Spain have produced 64 natural disasters from 1980Un ship arrives tomorrow to discuss El Hierro erupcionesCanarias sends the research vessel 'Ignacio Hierro Lozano'El confirms two submarine eruptions "We are losing valuable data there not having a scientific ship "
See all
Researchers from non-tip (volcanological Institute of the Canary Islands) have confirmed that the stain Public gases caused by underwater eruptions and El Hierro has landed in the top of La Restinga, approximately two hours. The researchers, who are still unaware of the details, go to the place to try to find out more information.

The submarine eruption is occurring in the area near La Restinga, in the southeast of the island of El Hierro could drive "at most" 0.1 cubic kilometers, ie, equivalent to 40,000 Olympic swimming pools, according to volcanologist Superior Council of Scientific Investigaiones (CSIC), Joan Martí.

So, Marti explained that "you can not determine" the total volume for the moment, it is unknown how much lava is coming out but, in his view, the maximum volume should not be out "very different" to the historical eruptions the Canary Islands.

This volume will continue to contribute to the construction of an underwater mountain range that takes thousands, millions of years forming south of El Hierro and therefore "this episode of eruption is one more building in the area, so from this point of view, this should be seen as part of the normal. "

On the material you are going abroad, said that molten basalt is primarily to hit the water cools and becomes rock and, in terms of turquoise blue stain is observed on the water, explained that "probably" will be due to remobilization of sulfur and clay from the ocean floor that gets stirred up and becomes turbulent waters.

There is a video Here
Little window on the right

reply to post by Anmarie96


Thank you Anmarie. I forget about "google translate".

2nd line

She now has a name. Not very pretty I'm afraid, just “1803-02″.
2nd line