El Hierro

[appy ammer]

its a conspiracy theory, dont get taken in;)

[jand]

volcanocafe copied.



Sooo i have been watching the footage over and over again and took this from PanCam 1 (PC1)

http://img23.imageshack.us/img23/5106/fisure.jpg

I am not sure about the -red 1- where its exactly located.
 But this picture is to open up a discussion.

when watching the PC1 it looks like they went back later on the day, could any one confirm that? because at the start you can see 3 vents (i recall someone asking earlier if the faint spot in the top (first few seconds) was also a stain. it does look like it when watching in negative. it clearly stands out against the reflection of the sun.
 anyway im thinking there either multiple vents on the sea mountain range marked or its a fisure eruption (thats what it looks like to the end of the video at least, that's why i am thinking they might went back later.)

Reply

[jand]

Hattie says:

 December 19, 2011 at 05:50

4.09 time 19 depth 2.0 mag NW Frontera

[jand]

@ Sativacyborg et al. Here is the Dec. 11, 2012 Barrera post, but do check the link for the duration chart of historic Canary Island eruptions.

by José Luis Barrera Morate, Spanish volcanologist

"Yesterday, December 10th, the submarine volcano La Restinga marked 60 days of uninterrupted eruption. This puts it eighth in duration for all the Canary Islands recorded eruptions (see table). In the table, multiple fissure eruptions have been treated as a single eruption (for example, the Siete Fuentes-Fasnia-Arafo fissure eruption). At La Restinga, bathymetric data indicate the existence of three vents, some of which are only 150-160 meters deep. Which one is the most active, if several are? This is not well understood. The fact that for 48 hours the tremor has shown more explosive episodes in a nearly periodic manner may indicate hydromagmatic bursts, implying that the active crater is shallower than in the first eruption."

Table showing the Relationship of the duration of the historical eruptions in the Canaries, ranked from highest to lowest: see website

TABLE: Updating La Restinga to December 11, 2011

The table is self-explanatory. The headings (in Spanish) are:

Año = year
 Denominación del volcán = name of volcano
 Isla = island
 Duración (en días) = Duration in days

http://blogs.elcorreogallego.es/elhierro/2011/12/11/60-dias-de-erupcion/

Reply

[jand]

Off topic but wish to wish everyone reading this thread a Merry Xmas and a Happy New year.

http://www.youtube.com/watch?feature=player_embedded&v=-hxp00368ns

[jand]

December 15, 2011 by José Luis Barrera Morate

"The oceanic volcanism arising near continental margins is affected by the sedimentary deposits of the banks. The Canary Islands are no exception. On the island of Fuerteventura, one of the oldest in the archipelago, oceanic bottom sediments from the Cretaceous period are found rising to the surface today. What is remarkable is that submarine volcanic materials are imbedded in the levels of dark marl and limestone; this is the birth of the island. These materials were deposited from turbid currents that brought limestone and terrigenous materials into the border
 zone ("fan fringe") of a submarine fan deep within the African continental margin.
 While volcanism was developing in the archipelago there were many events where rising magma interacted with the seafloor's sedimentary deposits from different periods. The precedents of this interaction are common in several of the Canary Islands. The last occurred in the eruption of Teneguía, La Palma, in 1971. The white, very porous and foamy looking fragments were considered rhyolitic igneous rocks in the first analysis made in 1973. Today, in light of what has happened in the submarine eruption of La Restinga, they are being reinterpreted as recrystallized sediments.

In La Restinga, the magma passed through the sandstone sediments from some massive debris (that of the Sahara?), recrystallized them, then they lost water and changed into the white foamy textured rock. The first analyses that were made classified the rocks as igneous, indicating that they were rhyolites and that authorities were minimizing the explosive nature of the eruption by saying that the rising magma was basanite, which is less explosive. These hasty exhibitionist-tinged statements violated the basic principle that precaution must prevail in all steps of a crisis, creating social alarm and confusion among the authorities, and contributing nothing to the management of the situation. The geologist José Luis Gonzalez, crisis management expert, reiterates this in his excellent blog about Natural Hazards, on the Association of Geologists page and other publications. http://www.icog.es/_portal/inicio/inicio.asp

The first scientist to inject sanity into this unsubstantiated alarm was Tenerife geologist Juan Jesus Coello, who denied the primarily igneous character of the rock in his November 9 report, which he illustrated with educational drawings. Recently, new interpretive data from several European universities have confirmed the sedimentary nature of the "restingolitas", finally settling the controversy. With a bit of research, they would have realized that in the Henry Seamount area, about 35 km SE of El Hierro's submarine rift, German geologists in 2005 had described the oceanic bottom sediments that come up to El Hierro island. [see diagram of seafloor south of El Hierro in post]. Therefore, it is predictable that the ascending magma in these places mixes with and recrystallizes the sedimentary material, as was seen the first time that pyroclasts emerged in the Las Calmas sea. In no other expulsion involving smoldering floating pyroclastics have the famous "restingolitas" appeared.

In the future we hope for greater prudence in regard to hurried and unsubstantiated claims that contribute nothing to good crisis management."

http://blogs.elcorreogallego.es/elhierro/2011/12/15/las-islas-canarias-%E2%80%9Cflotan%E2%80%9D-sobre-rocas-sedimentarias-diversas/

[jand]

This video shows a volcano errupting in Iceland it is very interesting to watch.

http://www.youtube.com/watch?v=p8CHSThR-Mo

[jand]

http://www.rtvc.es/volcanelhierro/volcanendirecto.aspx

There is a large stain showing this morning.

[fifi]

quote:Originally posted by jand

Off topic but wish to wish everyone reading this thread a Merry Xmas and a Happy New year.

http://www.youtube.com/watch?feature=player_embedded&v=-hxp00368ns

               ...........

Merry Christmas jand.[]

[TripleH]

quote:Originally posted by jand

Off topic but wish to wish everyone reading this thread a Merry Xmas and a Happy New year.

Does this mean you are retiring jand?

[jand]

Fifi

 Thanks for your card.

TripleH

Nope not retiring will be with this to the end!!!!!!

Just wishing everyone a Merry Xmas and Happy New year.

[jand]

The screw movements are back again on the graph for La Palma today.

[jand]

http://www.earth-prints.org/bitstream/2122/4138/6/Acocella%20and%20Neri%20Tecto2008.pdf

Dike propagation in volcanic edifices: Overview and possible developments.

Eruptions are fed by dikes; therefore, better knowledge of dike propagation is necessary to improve our
understanding of how magma is transferred and extruded at volcanoes. This study presents an overview of
dike patterns and the factors controlling dike propagation within volcanic edifices. Largely based on
published data, three main types of dikes (regional, circumferential and radial) are illustrated and discussed.
Dike pattern data from 25 volcanic edifices in different settings are compared to derive semi-quantitative
relationships between the topography (relief, shape, height, and presence of sector collapses) of the volcano,
tectonic setting (presence of a regional stress field), and mean composition (SiO2 content). The overview
demonstrates how dike propagation in a volcano is not a random process; rather, it depends from the
following factors (listed in order of importance): the presence of relief, the shape of the edifice and regional
tectonic control. We find that taller volcanoes develop longer radial dikes, whose (mainly lateral)
propagation is independent of the composition of magma or the aspect ratio of the edifice. Future research,
starting from these preliminary evaluations, should be devoted to identifying dike propagation paths and
likely locations of vent formation at specific volcanoes, to better aid hazards assessment.
© 2008 Published by Elsevier B.V.

[jand]

Timelapse video of the new stain from this morning.

http://www.youtube.com/watch?v=W2w7cp_20EU&feature=player_embedded

[jand]

volcanocafe.

Copied.

GeoLoco says:

 December 20, 2011 at 10:19


Keeping things cool is very good, and El Hierro is not Yellowstone, and Wagabond is basically right to put things in the context of the past (even if that gives no guarantee in matters of potential evolutions), but it pisses me off to be told a fearmonger because I say it is dangerous to live on a volcano. Even if I know that 90% of us will die of heart problems, cancer or car accidents. Those starving normally don't have internet...
 Walking on the ground of Vulcano/Vulcanello crater is dangerous because of the accumulated gases that some days might build a layer of 1 to 2 meters of thikness. That's not fearmongering avout this volcano, for example. Stating volcanoes are not to be taken with total cautiousness is just like giving a poo on tire pressure when you make 200km/h on the highway.
 Who among the interested in volcanology would now go and buy a house on El Hierro? Who? If the only thing that is to expect is a "tourist attraction" kind of activity... If I was a local it would be the lack of transparency in informations that would make me mad, not some volcanophiles exchanging thoughts, especially if they have the decency to repeat and repeat and repeat that they are not pro's.
 Those who know exactly what is and will be might still have a lot to learn. Lack of humility, especially when facing nature's powers and complexity, is no sign of maturity or intelligence. Signs of an arrogant society that now pisses its pants when one can't have his easy jet flight for 3 days. Is it fearmongering to imagine that we might see something more than Eyja's fart in terms of volcanism an during our lifetime? Of course it will not come from Bobby, that we have as a time killer waiting for more interesting activity – be honest...
 Imagining that a differentiated magma and pressure build up could lead to some kind of more explosive ans onland activity in the El Hierro context has nothing to do with fearmongering about a CME triggering global seismicity.
 Oh I'm so not made for socializing. Between the 2012ers and those who don't want to accept that it can be uncool to live on an active volcanoes, it's hard to find people to talk with. But let me please the hardcore non-fearmongers: on a global scale, whatever the worst-case scenario in the El Hierro case will be – the damage and consequences, including maximum human losses, just doesn't play anything like the tiniest role. The world and humanity doesn't give a sh... about whatever will happen there. We have other problems. So go on, live on this hill and don't bother with what could be or not. Wouldn't like to dissapoint anyone's pink-world phantasies with commenting the fact that an active volcano can be good for surprises. The real specialists know that eeeeverything is under control.
 Don't answer this – you can't imagine how I would stupidly smile reading it...

[jand]

Update 20/12 – 17:16 UTC
 - Today's NASA Modis satellite picture shows a beautiful swirling stain south of La Restinga.  We have zoomed into the current active vent which  can be seen in the right top carner of the image. The upper light soft patch at the left side of the zoom is probably the active vent.

[jand]

Update 20/12 – 23:55 UTC
 - Harmonic tremor is growing again since the last couple of hours
 - At 18:26 UTC a weak M 0.9 earthquake happened at a depth of 11 km below the El Golfo beach area

Update 20/12 – 23:43 UTC
 - Joke has a talk with Maria José Blanco from IGN during the morning hours. Here is synopsis of the answers Joke got on her many questions :
 - the current emissions are mainly gas emissions
 - gas is part of the erupting magma and while magma is flowing down along the volcano slope, the gas finds his way to the surface
 - sometimes the emission of gas is mixed with ashes, but we haven't seen or analyzed the ash in the current new vents. We hope to get some samples today  as the Salvamar Adhara is out to collect material. At the time of writing this update, no additional details are known.
 - escaping gas can also trigger the tremors
 - the main emitted gas component is CO². We are anxious to see what will happen with the Involcan CO² statistics as we see a lot of gas coming out of the vents. Since the end of November the measured CO² values are almost constantly decreasing.
 - i can also tell you that a new bathymetry mission of the Sarmiento da Gamboa is on its way and will start on Thursday. The Sarmiento will probably only work at night.  Joke jokes that we will certainly tell this to our readers as we want to avoid another hoax lava eruption : ) . (ER : we also remind our readers that the harmonic tremor graph will probably show drumbeats caused by the instruments of the Sarmiento).

[jand]

1117893 21/12/12 02.46.19 27.6497 -18.0390 18 2.0 4 SW ELPINAR.IHI

[jand]

This may explain why the sea looked like a whirlpool when there was lots of activity during the erruption process.

http://teamwork.jacobs-university.de/confluence/download/attachments/4359050/hydro_plume_p_31_40.pdf

[jand]

Raymand Matabosch Copied

Il n'est pas pensable de pouvoir asseoir des conclusions en se rapportant aux enregistrements des "ondes" et "spectrogramme" mis à disposition par l'IGN car ces graphes sont manipulés 8 à 12 ou 13 fois par heure... et ne correspondent plus à rien...

De fait, depuis des jours et des semaines, ils sont inexploitables...

En toute chose, minimalistes, ils ne correspondent pas à la réalité de l'éruption volcanique qui se produit au large de La Restinga...

It is not conceivable to sit findings relating to the recordings of "waves" and "spectrogram" made available by the IGN because these graphs are handled 8 to 12 or 13 times per hour... and correspond to nothing...

In fact, for days and weeks, they are inoperable...

In all things, minimalist, they do not correspond to the reality of the volcanic eruption that occurs off the coast of La Restinga... (Translated by Bing)

[jand]

earthquake-report.com

Update 21/12 – 08:00 UTC
 - If we do not count the 2 shallow earthquakes who happened in the El Golfo area on December 17, this is the first time that 2 new earthquakes were triggered since December 9.
 - The first earthquake was a M 2.0 quake at a depth of 17.9 km, occurred at 02:46 UTC and had an epicenter  below the sea 1 km from Puerto Naos
 - The second earthquake occurred at 03:58 at a depth of 13.1 km and had a magnitude of 1.1. Epicenter below land at approx. 1 km from Tacaron.

[jand]

Raymon Matabosch Avcan FB Copied.


A l'attention de celles et de ceux qui suivent l'éruption volcanique sur les webcams

La houle et les moutonnements, les webcams écrasant les plans, ne résultent pas tous des effets du vent sur la Mer de Las Calmas, ils résultent, aussi, de l'activité vulcanienne sous marine et elles et ils devront, pour essayer de comprendre et de lire la dite activité volcanique, se fixer sur les moutonnements qui peuvent paraitre anachroniques : avec mouvement de recul, tournant ou tourbillonnant, amas de moutonnements s'ouvrant en cercle, etc...

The attention of those and those which follow the volcanic eruption on webcams the swell and the moutonnements, webcams crushing plans, are not all the effects of wind on the sea of Las Calmas, resulting, also, vulcanian activity as marine and they and they will have to try to understand and read the said volcanic activity, set on the moutonnements which may be anachronistic published: with recoil movement, turning, or swirling, clusters of moutonnements opening in circle, etc... (Translated by Bing)

30 minutes ago · Like · 1.

[jand]

Update 21/12 – 23:41 UTC
 - A third earthquake occurred just 26 minutes ago. It had a magnitude of 2.2 and the hypocenter or focal depth was at 22 km. Epicenter was at approx. 3 km from Los Llanillos in the El Golfo Bay (these are preliminary data)

Update 21/12 – 23:08 UTC
 - NO additional earthquakes and only during the last hour a little more harmonic tremor.
 - We have added the number of pictures in our Picasa website. Joke is still very active and takes multiple pictures from the stain on a daily basis. Click here to watch them.
 - Joke went today to the CAP science center in La Restinga and asked the technician whether  and how the gases were measured. The man said that IGN was responsible for the instruments on El Hierro. These instruments are installed below the surface to avoid interference from externatal conditions like wind. Some are deep under the ground. Involcan is measuring gases with their container unit. The gases are constantly measured. Those from Involcan are published in real time on the website from the Canary Islands government. The IGN data are internal.
 - Joke also asked for the results of the Salvamar Adhara.  The CAP person said that they knew that the boat went to the vent / stain but that they did not know why and what the result was ...
 - Most of the local press has no new articles on the eruption
 - the latest report from the Cabildo dates from December 18 (used to be daily -1)

[jand]

The Samboa is out again over the stain this morning.

Buenos dias a todos los que madrugan, que ya son ganas. El sarmiento de Gamboa está ya trabajando en la zona del volcán. ¿Tendremos de una puñetera vez una batimetría, o seguirá siendo secreto de estado?. Vamos a tener que contratar los servicios de la CIA para hacernos con las batimetrías http://#8203;a2.sphotos.ak.fbcdn.net/#8203;hphotos-ak-ash4/#8203;400630_118102734973407_1000#8203;03210428037_91402_138792_n#8203;.jpg


Good morning to all those who they madrugan, which are already eager to. The sarmiento of Gamboa is already working in the area of the volcano. We will have a bloody time a bathymetry, or it will remain a State secret? We are going to have to hire the services of the CIA to get with the http://a2.sphotos.ak.fbcdn.net/hphotos-ak-ash4/400630_118102734973407_100003210428037_91402_138792_n.jpg bathimetrys (Translated by Bing)

[jand]

This is completely off topic but its a breathtaking video in HD taken under the Red Sea.

http://www.youdive.tv/The-first-Full-HD-video-on-the-web-The-Red-Sea-has-never-been-so-close_v116.html

[fifi]

quote:Originally posted by jand

This is completely off topic but its a breathtaking video in HD taken under the Red Sea.

http://www.youdive.tv/The-first-Full-HD-video-on-the-web-The-Red-Sea-has-never-been-so-close_v116.html

Wow, thanks for sharing that jand. Its fantastic. I snorkelled once off the coast of Isla Mujeres in Mexico and it was one of the most beautiful and thrilling moments of my life. I will never forget it.[]

[jand]

Update 22/12 – 10:53 UTC
 - Each time that we say that the eruption is almost coming to an end, the volcano answers with a new round of activity. Also this morning. Additionally, we think that the main vent is active again as the location of the beginning of the stain is approx. the same location that we know from before
 - Joke has taken a number of pictures from the Sarmiento da Gamboa who is currently doing bathymetry activities in the Las Calmas sea
 - Joke reports that the Salvamar Adhara which was navigating in the stain yesterday found only gas emissions and very fine ashes
 - Everybody in Spain (also at El Hierro (except Joke)) plays today with the National Lottery – it is a true hype and everybody wants to become a multiple Euro million winner today !
 - A 2.8 ! earthquake occurred at 09:11 at a depth of 26 km 600 meter south from the Tacaron coast. This is the first earthquake today. Click here for the epicenter.

[jand]

Latest 2.8 earthquake position.

[jand]

Avcan FB Copied and Translated.
The seismicity of the last days is mainly in the Gulf area, with the exception that has occurred yesterday evening that seem to go through the area of the magma conduit in direction to the eruptive zone in the sea in the area of la Restinga. Today there has been a notable earthquake of 2.8 to about 26 km of depth in the Julán in the coastal area.

[jand]

Latest Modis Photo from space. Someone on one of the other sites has commented about the white spot between El Hierro and La Palma - Cloud?


http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=Canary_Islands.2011355.aqua.250m