El Hierro

[TripleH]

quote:

PS.  Fifi, are you a fellow artist?

I think she is a painter and decorator

[jand]

Morning everyone

http://www.youtube.com/watch?v=OhYqCxpoJbM

Video from the helicopter.

[jand]

Diana Barnes says:

 December 1, 2011 at 08:07


Arrrrrgggggh! Webcam down! try this close up of Bob's rocks!
 http://earthquake-report.com/2011/11/12/32535/

Sea steaming again rocks errupting,

[jand]

The ship Gamboa is just in the stain now where there are steaming rocks being thrown up into the sea.

[jand]

A darker stain seems to have formed where the rocks have been errupting the ship over the stain has left .

Could this be a new mouth/vent?

[fifi]

Morning all... Surfista and TripleH....you are both right.I studied at the National College of Art and Design but am painting the house at the moment. I only paint for pleasure and not for a living.[]

[SurfJames]

quote:Originally posted by fifi

Hi Surfista and TripleH....you are both right.I studied at the National College of Art and Design but am painting the house at the moment.[]

That's fantastic fifi.  I have a lot of artists friends and love being in their company. Most of the people I perform with are artist or sculpturists (Is there such a word as that?[])

That video jand makes you realise how big the wole thing is jand.

Do you think it will erupt via Tanganasoga? I feel worried for the population if it does.  []

[SurfJames]

quote:Originally posted by Surfista

'The sea water enters the vent and reaches the molten magma. The temperature is so high, that it instantly boils forcing the water away from the molten surface. This creates a detectable sound which is rather like someone hitting a drum. A fraction of a second later, the water vapour collapses and the water rushes back to the molten surface and the the whole process repeats itself - over and over again. The result is a sound like someone hitting a drum skin.'

Interesting theory and rather akin to those shrimp that can emit a bubble/s at such velocity the water around it instantly vaporises - and an incredibly loud sound is heard as the vacuum created is refilled...some say over 200Db.  Sounds like similar science to me.

PS.  Fifi, are you a fellow artist?

Hi surfista.  I like the analogy to the shrimp. They stun their prey in this way, I believe, and can smash the glass in an aquarium!

Similarly,  If you ever go to an oesteopath, the pop noise when they articulate facit joints in your spin, is cause by a small bubble of nitrogen being formed and then collapsing. In that split second, the nerves move back to their correct position and you get instant pain relief.

Water vapour collapsing at the magma surface might create the same sound perhaps [?]

Are you also a fellow surfer matey [][][8D]

[fifi]

Sculptors.[] Great bit of action in the sea this morning....lots of steaming lava bombs. Im still hoping the main event will be at sea but we will have to keep tuning in to see what happens....wish it would hurry up. If a new Island is eventually created I will be one of the first to visit.[]


This area seemed to be emitting a stain yesterday....

[jand]

SurfJames

IMO Tanganasoga to me is where all the magma is feeding all the old underground chambers and caverns and caves this is just a feeling I have.

All the eartquakes seem to be happening in a straight line from North to South bang slap in the middle where Tanganasoga is.

Of course I could be wrong.

Copied below by a spanish person from Volcanowordpress.


I'm not from El Hierro (I'm from La Palma, and currently living in Tenerife).. But I'm pretty worried about the situation there, mostly because I think it's being handled so badly (due to politic/economic interests in my opinion, tourism principally).. furthermore, I have friends who live in Frontera, Sabinosa and Los Llanitos (risky area right now).. that's why I'm asking about Tanganasoga volcano, because those villages are quite close (at the base of the volcano) and I have fear of landslides (as it's well known there were cataclismic ones in the past, in El Golfo area).. and the strenght and the patience I believe are 50% misinformation.. sad but true as we live in volcanic islands :S

Reply

[jand]

http://www.01.ign.es/ign/layoutIn/volcaSenalesAyerHoy.do

La Palma and La Gomera graphs still showing movements.

[jand]

http://www.youtube.com/watch?v=NSCyHRAbFbA

Video from this morning.

[jand]

earthquake-report.com

Update 1/12 – 09:28 UTC
 - The location of the active vent is about the same as a few days back because the buoy can be seen in the lower left part of the webcam screen (of course when the zoom is correctly displayed)
 - We think that the current active area is very big. Based on the helicopter footage and videos from the last few weeks, we know that the grey area is the area having most emitted material
 - The time lapsed video below shows that the hot lava activity is only happening occasionally, but to give you an indication, the biggest fume plume must be at least 10 meter long!

[jand]

http://pubs.usgs.gov/pp/1769/chapters/p1769_chapter01.pdf

Interesting page 11 with explanations of each graph underneath.

[jand]

earthquake-report.com
The Ramón Margalef can be spotted right on the active stain. The crew takes a lot of risk for the sake of science. The ship has also topography equipment on board and the current sailing will probably deliver an new sea floor model soon.
 - On the La Restinga Telefonica village webcam (when it is operating !), one can see the stain almost coming into the La Restinga harbor.

[jand]

earthquake-report.com

The scientific data indicates submarine effusive/explosive eruption of basanitic magmas (a type of basalt) which is forming pillows or lava tubes due to rapid cooling with seawater at 200-300 metres.
 - This is a critical depth because at this depth when water is turned to steam there is a large expansion in volume. Hence the upwellings and turbulence associated with this submarine eruption as gases are expelled from 1300 degree magma as it is rapidly cooled by water.
 - The upwellings/discolouration are a surface manifestation of this submarine turbulence occasionally bringing up fragments of highly vesicular (gas rich) black glassy rocks (hot floating rocks) mixed with a "soup" of marine sediments (muds etc).
 - The unknown is how much magmas exists in the present system and in turn how much longer this activity will happen, because the two are inextricably linked.
 - Seismic data shows that earthquakes are shallower (<5km) and stronger which may point to focused flow of magma into the crater. Sitting on a slope made up of debris flows (landslide) one has to ask will much of the effusive/explosive activity be dispersed into deeper water (downslope) or fill the crater ? If magma "flows" down slope the activity will remain as is and if magma supply shuts down everything will cease. The activity may well be the submarine equivalent of the many basanitic volcanic cones seen around La Restinga.
 - El Hierro has more "recent" volcanic scoria cones than any other Canary island.
 - The sub-aerial scoria cones represent explosively fragmented magma erupted over a short period of time. So one could extrapolate that to the submarine activity – short-lived, low magma supply. However we need to consider and be prepared for the alternative which is that magma supply is maintained over a prolonged period of time and that the magma system propagates into shallower water. If that happens we will observe a Surtseyan type eruption as the system undergoes a highly explosive transition from submarine to subaerial activity.
 - The Earthquake-report.com site has links to YouTube footage of Surtseyan activity at the end of the last century in the Fayal Azores (1957) and Surtsey, Iceland (1963) so the authorities are well aware of what that would mean for La Restinga & El Hierro.
 - The truth is that, we as scientists, do not know the future outcome of this activity. The best we can do is what is being done by the IGN and other authorities – closely monitor and observe the activity, integrate those observations and keep people informed.
  Update 1/12 – 10:57 UTC

[jand]

[fifi]

Research vessels continue their research in the waters of El Hierro

12/01/2011 ... 15:04 - Ministry of Economy, Finance and Security

Earlier today there was  pyroclastic steaming at sea which disappeared leaving a large brown stain

 The Ramon Margalef  and Sarmiento de Gamboa continued their research in the waters of El Hierro at the request of Civil Protection Plan for Volcanic Risk (PEVOLCA)

The B.O. Sarmiento de Gamboa finishes its bathymetry work today , gravity and conducting seismic profiles which began last Tuesday, to begin the campaign had initially planned research on the continental shelf of the Canaries..

Ramon Margalef, is focused on multibeam bathymetric survey with the sediment sampling and acquisition of echograms of the water column.

This research will provide important information for monitoring the eruptive episode that will join, soon, the work of a second ship of the IEO, the Cornide de Saavedra, who will continue the measures initiated by the Canary Islands Oceanic Platform (PLOCAN) and Ramon Margalef on the study of physical and chemical evolution of the stain from the volcano.

Evolution of the eruptive process

Scientists at the National Geographic Institute, on board a vessel Salvage, ascertained that the pyroclastic appeared early in the morning today, disappeared and gave way to a brown stain, composed of fine material, which spread very rapidly by sea #8203;#8203;surface. Maritime Rescue Cooperation is being helpful for nighttime inspections, recognition of the area and collected water samples, necessary to determine their physicochemical properties.

Regarding the seismicity should be noted that IGN has confirmed that during yesterday only 3 earthquakes located at 9:00 pm, at 16:17 hours and 23:25 hours, none of them felt by the population . According to provisional data of the Institute, until 13 pm today there had only been two earthquakes with magnitudes less than 2 on the Richter scale.

On the tremor signal has remained constant throughout the day, showing a slight decrease over 15 hours and mid afternoon. Notably, there have been few and of low amplitude pulses and in the analysis of the data is not evidence of any second source of tremor.

Finally, note that the deformation monitoring stations maintain the deformation pattern of recent days, following the same trend of deflation in the vertical component of the stations south of the island and the eastern Gulf and stability in the horizontal components.

 http://www.gobcan.es/noticias/index.jsp?module=1&page=nota.htm&id=145749 (Not a great translation....sorry)

[TripleH]

quote:Originally posted by jand

That looks like a nude person looking behind them as they run away. Anyone else see it?

[jand]

Lots of movements on todays graph for El Hierro.

[jand]

http://www.youtube.com/watch?v=dhHrVZhvdgM

Avcan FB Translated

Video sobe a spectacular basalt casting which in the pit of the Calcosas, emblematic place of El Hierro is delivered to the Atlantic sound

[jand]

The seismic cloud under the first of December of 2011 iron (JR)
See Translation

[jand]

Just posted on Avcan FB Translated from Spanish

Luis Manuel Bricicio

I wish that someone corrected me. The magmatica of a volcano camera is the reservoir of magma, the place where the magma is stored which subsequently (not 100%) high volcano... do if or not? In El Hierro and there are (for now) a volcano and is throwing magma does whether or not? Then we have camera magmatica. To the North the high ground of this (and elevandose). But one has noticed something moving beneath their feet (literally) does magma? This magma has to locate on somewhere right? Then another camera magmatica... then the hypothesis of Maria Isabel has data and reasoning, right? Then as a hypothesis is valid. It is my opinion and I share with her. (Translated by Bing)

This is beside the point of what he said Maria Isabel in a previous post: but is that NADIE HA PENSADO that with both movement SISMICO SE HA FRAGMENTADO EL ground and we have several cams of MAGMA that SE HAN found and SE HAN United for form A great camera MAGMATICA that travels TODA LA Island to his whim...CALL DOOM BUT MANTENDRE MY HYPOTHESIS THAT THE SITUATION IS MUCH MORE DANGEROUS THAN WE IMAGINED!

[TripleH]

Jand can you see it?

[TripleH]

Jand?

[fifi]

Thats an old pic of the stain I think. I recognise it. I used to think it looked like a nude footballer.[]

[jand]

TripleH

Yes I can see the nude the head is looking backwards to the right.

Fifi this was posted today as a picture of what the ship the Samboa was mapping over the last couple of days maybe the stain has not moved?

Have you noticed if you join the lines together on the rectangle again it is the area around the Tanganasoga?

[jand]

Avcan reply to Luis post above.

Translated
Hi Luis, iron, according to its historical volcanism usually form a channel of promotion or dam which is very common in the Canary Islands and which can be seen in many places, which according to the hypothesis comes from small cameras monogenicas of single-use and time of each of the different eruptions.


Through these cracks open and enters the magma to form dikes and sills, 3 things can happen. That magma is still moving seeking a way out, magma stop and be cool in situ or both things as pressure mounts by the increasingly wide dike (and if you change the composition gives a few precious with bands dikes and causing further deformation in the area.) The inherited the iron magma camera, there is, this very deep and possibly is connected somehow intermittently with the mantle, also have formed very recently. (since July of this year at the earliest)


That the situation is dangerous because the volcanic risk, that already nobody doubts it, why is the traffic light like this, but now only can be one thing, watch to see how it evolves the volcanic system, now more than ever this lively South (erupting to the is of la Restinga in the sea) and live in the North (pre-eruptivos in the medium term symptoms)(not a short time). That is why I do remember that everyone can rest assured, but not in calm, it has to be on alert if there are changes and new official notices (Henry).

[jand]

Fifi/SurfJames/Glen/TripleH or anyone else can you please explain whats happening on the graphs for La Palma this is the second day now these movements have been there. I have checked them and there have been no earthquakes on El Hierro I can match them to.

[fifi]

Hi jand , will be back later as im in company. I know the image and it is an old one ( pretty sure about that) and I will look for it . They are obviously using it as a guide because it shows a reference to where the original emission was. Yes I did notice the lines and thought a lot about them.