El Hierro

[jand]

Data Update 26/11 – 23:42
- A lot of action in the sea means mostly a limited number of earthquakes. Today only 8.
 - Depth in between 14.8 and 20.3 km
 - Medium harmonic tremor with a limited number of bursts

Ian Carson reports from El Hierro :
 I went to La Restinga at first light to see any overnight developments - there weren't any - just the usual stain a bit closer to the shore. After an hour and as it was lovely morning, I went sightseeing. I was returning to La Restigna when I got the message of smoking lava stones.
 When I arrived there were little 'bombs coming to the surface intermittently. These got more frequent for a while and then only one every 5 mins. After a while the activity again increased, bright Jacuzzi and many stones coming up, generally smaller than the first batch. Stones were visible on the surface. The affected area seemed to be getting larger and the activity seemed quite intense when I had to leave at 17.40. I look forward to first light ! The Ian Carson images are included in the group below. Click on the image to watch the entire group of pictures.

Update 26/11 – 22:30
Collection of pictures (webcam and camera) of the smoking Restingolitas (lava stones). The rest can be viewed in our Picasa album of November 26. Click on the picture to watch all the images.
 Once again, our readers are making the difference in reporting. As we have NO money to pay for professional people we have to rely on volunteers. Earthquake-report.com is (on behalf of our readers) so happy to have volunteers like Joke and Ian, but in this case we also thank Birgit, Hans-Werner, Marchal, Kasper and Leona.

https://picasaweb.google.com/110327184570944806725/ElHierroNovember262011?authuser=0&feat=directlink#

[jand]

http://volcanocafe.wordpress.com/

This will be a rather short post. During the last day I have received some information regarding Tanganasoga. Apparently it has been known for some time, but held back from the general population of El Hierro, that Tanganasoga is suffering from rapid inflation due to magma injection.

The Inflation

Even though I had two individual sources stating this, I still wanted to have additional confirmation before I wrote about it. After all, now we are talking about a volcanic feature that possibly can cause fatalities. So to get a bit of confirmation I asked GeoLurking to make a plot of the current uplift. It seems to indicate that there is an ongoing inflation in the Tanganasoga volcano.



Image: GeoLurking. Inflation hypocenter of Tanganasoga

Carbon dioxide map

CO2 is one of the premier gasses when you try to judge a volcanoes state. If you have an increased emission from a volcano you have yet another precursor to a possible eruption. As can be seen on the image below the area of Tanganasoga is leaking CO2 quite badly right now. The northwestern red area is related to the Roques de Salmor gas-vent.


Image: Unknown creator. Several zones of high CO2 release in and around the Tanganasoga volcano

Tanganasoga inflation



The inflation of the Tanganasoga Volcano puts strain on the rock face pointing down towards the village of Los Llanillos. As the rock face is put under strain it will sooner or later start to shear and parts of the rock face will start to come loose and fall down.

There is also a small risk of a lateral collapse of the mountain side if an eruption occurs at Tanganasoga. I am not saying that it would be like Mount Saint Helens, the pressure is just not there. But, between 0.5 and 2 cubic kilometer of rock going down into the bay is not good news. And then on top of that, magma flowing down after the falling rocks. Well, I for one would not like to be in the way of it all.

Let us be clear on one thing, I am not saying that there will be an eruption at Tanganasoga. But the pressure build up on the rock alone requires diligent monitoring. And the political will to evacuate Los Llanillos if there is an increased risk of a larger rock fall due to mountain tension. If the risk increases even more, which I think is likely after seeing the CO2 map. They need to make serious preparations for evacuation of everything from Frontera to Sabinosa. Because if there is an eruption at Tanganasoga there will be rockslides, magma flows, and yes even the small risk of pyroclastic flows. And it will all most likely be going into the town of Frontera, so there is not being any leeway for risking a non-evacuation. It is time for the small boys of IGN, Pevolca, Involca and the rest to grow up, and grow a pair.

[jand]

There is no stopping me now!!!!!!!

[jand]

http://212.170.244.196/

Boat now going out to look at new stain sea is smoking again !!!.

Hope the people in the boat know what they are doing they are getting so close to the smoking sea and hope the boat has a fireproof bottom.!!!

[jand]

A lot of people on Avcan are saying how brave of the people in the boat to go out and take a look and maybe they are collecting samples dont think its the Ramon Margolf think they are saying its just a search and recue boat.

Some are worried the rocks will hit the propeller.

[jand]

http://www.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CHIE_2011-11-27_08-09&estacion=CHIE&Anio=2011&Mes=11&Dia=27&tipo=2&hora=08-09

[jand]

Data Update 27/11 – 08:09
- the action which started yesterday by floating smoking stones is continuing this morning,  hot pyroclastic material is floating to the surface. Just behind a weak jacuzzi is formed. All this can be seen on the Telefonica eruption webcam.

[fifi]

quote:Originally posted by jand



There is no stopping me now!!!!!!!

Well done with the pics jand.[] Wow the sea is covered with floating steaming rocks today.

[pennylane]

Morning Jand..I'm glued to the web cam.......

Glen

[jand]

Data Update 27/11 – 10:52
- 10 earthquakes since midnight UTC
 - strongest earthquake being a M 2.3
 - the remaining earthquakes having a magnitude 1.3 and 1.5
 - a VERY IMPORTANT new fact we have seen tonight is a shallow earthquake at a depth of ONLY 1.9 km (providing the data is correct). If new earthquakes would occur at this depth, an eruption event in the El Golfo bay cannot be excluded. - Harmonic tremor is medium to strong at some times. The graph below gives an overview of harmonic tremor from 8 AM to 10 AM UTC or local Canary island time.

[pennylane]

Morning Fi...no house work getting done her today ha ha hope you're well hun x

[jand]

Morning Everyone

I honestly did not think in my lifetime I would be watching live in the sea in the Canary islands a steaming sea caused by from volcanic pyroclistic rocks being thrown upwards from a volcano errupting !!

[fifi]

Morning everyone. Hope you are all better Glen x Its a good day for the webcam. It must be near the surface now like Raymond suggested.[]

PS just saw your post jand....yes neither did I, fantastic to see.[]

[jand]

http://www.flickr.com/photos/presican/6410550847/in/set-72157628171595555

[fifi]

Fantastic photo jand. If only we could have webcam shots like that.

Im surprised to see such a large area covered by them today.

[fifi]

Copying your pic jand so everyone gets to see it. (I know some people are wary of clicking on links and its worth a view)[]

[kevin2003]

quote:Originally posted by jand



There is no stopping me now!!!!!!!

[fifi]

Switch on the webcam Kevin. Its great at the moment. Erupting beside the ship and the helicopter is out now too.[]http://earthquake-report.com/2011/11/12/32535/

[SurfJames]

Fifi / jand....wow that's an amazing photo.

Things are really hotting up now (excuse the pun!) []

Amazing show going on at the moment. The whole area appears to be boiling and thrusting up hot lava. [8D]

Not long now for the rooster tails fifi !!

[falkirkdan]

Do not fancy being on the Guarda boat at the moment.   Looks like like in the heart of the bubbles.   To me would be more prudent to stand off on the windward site of the jaccuzi.

Here comes the helicopter.

[kevin2003]

quote:Originally posted by fifi

Switch on the webcam Kevin. Its great at the moment.

[pennylane]

OMG the boat and the helicopter there at the same time  the boat is way too close

[SurfJames]

Wow - rock after rock. Did anyone else just see that vertical burst of steam and rock? [8D]

Also - how come the stain appears so far away today?  Another vent perhaps?

This is amazing to watch - amazing!!!

[fifi]

Woo hoo. Not long at all I would say Surfjames. Bring it on.[]

[fifi]

This is great. Im loving it.[] Pity we are all in different countries or we could have a fantastic time together. The oohs and aahs out of me are hillarious when I think something big is about to happen.[][][]

[fifi]

quote:Originally posted by kevin2003

quote:Originally posted by fifi

Switch on the webcam Kevin. Its great at the moment.

Oooh Kevins got it switched on now too.[][][]

[SurfJames]

quote:Originally posted by fifi

Woo hoo. Not long at all I would say Surfjames. Bring it on.[]

And the authorities have given the all-clear and suggest that the volcano episode is over!  Doesn't make sense to me.

Bring it on - we want roosters !!![][][8D]

Doesn't the helicopter look tiny besides the boat.

Wish I was out there too - must be real exciting.

[fifi]

quote:Originally posted by pennylane

OMG the boat and the helicopter there at the same time  the boat is way too close

Brave men in uniform....dont you just have to love them[][][][]

[fifi]

quote:Originally posted by SurfJames


And the authorities have given the all-clear and suggest that the volcano episode is over!  Doesn't make sense to me.

Bring it on - we want roosters !!![][][8D]

Doesn't the helicopter look tiny besides the boat.

Wish I was out there too - must be real exciting.

            ...........



We did point out that the authorities are a little bit on the shady side.[]

[falkirkdan]

Will we be having headline on news.   Coastguard boat sunk by volcano???