[breaking] Vulkaanuitbarsting bij Canarische Eilanden #2

quote:

Data Update 21/11 12:46 UTC
Contrary to what we said earlier on, a new stain might be forming. Ian Carson (see below) did report us a couple of hours ago that he saw signs of a faint Jacuzzi. The eruption Telefonica webcam did confirm Ian's words later on. Depending on the sunmight, the new stain can also be seen on the webcam. An additional sign of the present activity is the overflying Guardia Civil / Involcan helicopter. They are flying out when involcan can measure some emissions / water temperature etc.

quote:

URGENT: Members of the Helicopter Unit of the Civil Guardica, currently works with Involcan in the monitoring of the eruption in the South of La Restinga have located a new eruptive mouth into the sea. More data in the next few minutes.
[bron]

quote:

Involcan continues to record an increase in the diffuse emission of CO2 by volcanic system #Canarias #ElHierro
[bron]

quote:

#ElHierro The Involcan located a second mouth LaRestinga eruptive #Canarias

quote:

# ElHierro The Pevolca reiterates that volcanic activity can produce earthquakes up to 4.6

NEMESIO PEREZ EN VUELO CIENTÍFICO - INVOLCAN - GUARDIA CIVIL

quote:

Op maandag 21 november 2011 15:47 schreef bwt het volgende:

HQ Joeptjoep video

NEMESIO PEREZ EN VUELO CIENTÍFICO - INVOLCAN - GUARDIA CIVIL

quote:

Op maandag 21 november 2011 14:53 schreef bwt het volgende:

URGENT: Members of the Helicopter Unit of the Civil Guardica, currently works with Involcan in the monitoring of the eruption in the South of La Restinga have located a new eruptive mouth into the sea. More data in the next few minutes.
[bron]

quote:

Do you just realize what I just did? I shared from my private wall a post that put "test". After I deleted on my wall and be able to verify that also disappeared here. That's what happened. The non-tip published a post and we share but disappeared when they eliminated him. I wanted to tell you that we have felt very bad. We thought we deserved more confidence but some seemed very demanding post and you accuse us without us knew why. I think we deserve the benefit of the doubt. That said, I could not shut up, apologies to everyone for the inconvenience (Fernando)
[bron FB]

quote:

Important Update 21/11 – 18:06
In a twitter message tonight, PEVOLCA and IGN have dismissed that todays activity would be a new vent. IGN and GES scientists made a flight this evening by helicopter. The information from Ian Carson came from the helicopter flight of the Guardia Civil which took off when the activity was at his strongest, which cannot be said from the IGN / GES flight !

quote:

[bron]
The fissure eruption progresses and the tunnel cracks

Since submarine eruption occurred on 10th October, all to think that the crisis would end in a few days. But it was not. We have 40 days of eruption and do not know when this is completed. In the north of the island in El Golfo began a new seismic crisis hypocenters deeper and somewhat higher magnitudes. Also the direction of the new crack is different: it aims at La Restinga directly. If it progresses to the ground, the danger increases and thus, risk.
The risk is not whether there will be eruption or not. The status of tunnel of Roquille is worrying. On October 18, technicians inspected it and found many deficiencies caused by earthquakes: cracks in several tranches, with the anchors detached wires, deprendimientos in the key, ie the current state is dire. With popular pressure, who is now dares to say it is dangerous to travel on it while continuing to earthquakes, some of magnitude 4.0?
Another day I'll tell you what the rooster tails.

quote:

Update 22/11 – 11:40
Reader Paul Abuelo (a multiple commentator) attracted our attention on a sublime document entitled "The Canary Islands Hot Spot". The extract quotes : The Canary archipelago comprises seven main volcanic islands and several islets that form a chain extending for ~ 500 km across the eastern Atlantic, between latitudes 27�N and 30�N, with its eastern edge only 100 km from the NW African coast. The Canary Islands developed in a geodynamic setting characterized by Jurassic oceanic lithosphere formed during the first stage of opening of the Atlantic at 180-150 Ma and lying close to a passive continental margin on a very slow-moving tectonic plate – the African plate. In addition, the archipelago lies adjacent to a region of intense active deformation comprising the Atlas mountains, a part of the Alpine orogenic belt. Click here to read the entire document.

quote:

Photo scientific Involcan-flight Helicopter Service Civil Guard related to sudden release of volcanic gases recorded at 11:40 pm on November 21, 2011 south of the Restinga

quote:

Now all eyes turn to the north by the earthquakes, but we must not lose sight of the volcano in the South, the tremor continues to fall and is still active.

The reading of the descent of the tremor and as I said this morning, is that either the system is losing pressure or is clearing the road and washed out better by merging edges that cause tremor.

The case is that the option in which southern volcanic system continue to lose pressure, seeing that the tremor that begins to have explosions, and if it continues that way, or there is a chance of water entry into the system we could find something no one expected, the water from the volcanic system, and then we got the surprise of a possible full-scale revival by interacting with the magma water in the ducts. In fact I think it happened once, when the tremor began to give out those explosions and light gray spots and fine material in the water.

Commented this possibility, especially how close the current eruption of the village of La Restinga and because one thing I worry about the possibility that another mouth open near or close to the same or the same and this must be taken into account, as the magma flowing beneath the town, so if the time came, no one be surprised if it happens.

In the event of that would be awful for the town and the people of the Restinga, because if such were the case to be opened in the port or next to one of the piers would hydromagmatic explosion of several hundred meters .

We'll see what happens at the end, nature has the last word, and although pre-eruptive activity North portends something in that area, there is no need to remove the eye to the activity of the volcano south of La Restinga. (Enrique).
[bron]

quote:

NOTE AVCAN 339 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 23 November 2011-11:00 h peninsular - seismic-volcanic activity continues with moderate to high seismicity in the Gulf marine area. Continue an important sign of volcanic tremor in the Restinga area, and increased slightly (10%) to return to decline since the last note. The magnitude of the earthquakes between 2.4 (except for one 3.3) and 1.6. New earthquakes 15. Felt earthquakes 1. Depths between 15 and 18km (and three to 19, 20 and 21km). The day before yesterday 24. Yesterday 35. Today are 10. A total of 11,784 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

quote:

Data update 23/11 10:11
- Joke has just reported that what they see from the mountain is quiet spectacular. She met Ian Carson a little while ago and both are shooting pictures of the activity, which we will publish when they have the opportunity to upload them.

Data update 23/11 08:46
- Joke Volta told me a little while ago that the stain is clearly visible from El Pinar this morning
- IGN has listed 7 M+1.5 earthquakes since midnight UTC
- The depth varied from 15 to 20 km. We notice more earthquakes at a depth of 15 to 17 km. Nothing to implicate direct danger.
- Yesterday, the day ended with 35 earthquakes, 2 being stronger than M 3
- Harmonic tremor at medium strength with more occasional strong bursts
- Air Quality at La Restinga : no unusual values
- weather outlook : 15 17 knots winds and wave height 2.5 meter max. Partly cloudy.

quote:

image of the intense volcanic gas discharge by submarine eruptive activity during the morning of November 23, 2011. Photo: Civil Guard / InVolCan

quote:

Data Update 24/11 08:53 UTC
- Only 1 earthquake at a depth of 24 km since midnight UTC ! This is probably the quietest night since a couple of months !
- harmonic tremor can be called medium
- weather outlook : wave height max. 2 meter wind speed : 11 to 12 knots increasing to 14-15 in the late afternoon + sunny
- Joke reports from El Pinar that she sees a soft colored sea without a specific vent

quote:

New 'riff raff' La Frontera-Pevolca. 'The mayor says "Pevolca is no administration to govern here,''
[bron]

quote:

NOTE AVCAN 341 - EARTHQUAKE ACTIVITY-VOLCANIC - HIERRO ISLAND - 24 November 2011-11:30 h peninsular - seismic-volcanic activity continues with moderate to high seismicity in the Gulf marine area. Continue an important sign of volcanic tremor in the Restinga area, which remains small amplitude oscillations and a growing number of explosions, possibly hydromagmatic a more or less regular intervals of about 3 hours. The magnitude of the earthquakes between 2.5 and 1.7. New earthquakes 4. Depths 10, 17, 24 and 25km. The day before yesterday 35. Yesterday 21. Today they 1. A total of 11,796 earthquakes are located in El Hierro by IGN from 9:00 am of July 19, 2011 (Enrique).

quote:

Tanganasoga Vulcano Inflation
November 22

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.



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.



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.

CARL

http://volcanocafe.wordpr(...)a-vulcano-inflation/

quote:

Look at it as a constantly heated cooking pan. If the fire underneath remains the same, the cover will regularly blow off some steam. The same is the case here. The vent is feeded with new material / gases (from the deeper areas in the El Golfo area) and when the pressure gets higher than the water column, it blows off. As we had only 2 volcanic earthquakes today and a more or less harmonic tremor, the process is not too much altered (like it was the case many times before). When the stain was seen at first (around October 10) a similar process had started. Very few earthquakes with a growing colorful stain. So, the main reason why there are so few earthquakes today, is that multiple vents have been opened (see the pictures from yesterday), and that a lot of material is erupted. If the process follows the same pattern than during the October 10 phase, more action is expected. Unfortunately bad news for the fish and for the people of La Restinga.
Armand

quote:

My take is that this might be the final blow of Bob, and that the tube will shut down soon in a systemic collaps. Afters that Bob may, or may not, erupt closer to the harbour, in the harbour or onland.
But, the current reports of sulphuric smell at Frontera tells an alternate story, a story that is corroborated by a lot of circumstantial evidence and an official report from one of the organisations stating that the most likely thing to happen now is an eruption happening on the line from Tanganasoga to Los Llanillos (Net ten westen van Frontera).
I made a mini-post comment yesterday about this after reading the internal report of the organisation in question.

quote:

Elblogoferoz .- Although they have fallen in the north of El Hierro the number of earthquakes, yesterday have appeared with some frequency volcanic signals 'lp' (long period), as confirmed by the official communication from Civil Protection Plan for Volcanic Risk (PEVOLCA). These signals were recorded at the seismic station of La Palma, one of the indicators are precursors of an eruption.
For those unfamiliar with the terminology a sign 'lp' is like a jerky tremor and clear evidence of magma movement.
In addition, there is increased pressure continues to increase and diffuse emission is carbon dioxide (CO2) into the atmosphere by the volcano island of El Hierro. The information provided yesterday by the Institute of the Canary Islands volcanological (PEVOLCA), reflecting that has reached 2186 � 87 tons per day, an amount equivalent to 6.34 times the normal average value considered for the diffuse emission of carbon dioxide (CO2) in the island of El Hierro (345 tonnes per day).
Volcanic gases. Since last July, scientists at the Institute of Technology and Renewable Energies (ITER), an agency of the Cabildo Insular de Tenerife, the 8500 non-tip have been more diffuse flux measurements of carbon dioxide (CO2) in the Island El Hierro through numerous scientific surveys on volcanic gases diffuse emissions that have materialized over the entire surface of the island of Isla Meridian.

Pevolcan continues to record an increase in the diffuse emission of CO2 by the insular volcanic system


The purpose of these scientific surveys to assess spatio-temporal variations of the diffuse emission of carbon dioxide (CO2) into the atmosphere by the volcanic system island of El Hierro in the context of the recent seismic-volcanic crisis Island Meridian . On the other hand, realize the reasons for this type of scientific stem from the inability to obtain such information through permanent instrumental networks, to be absolutely convinced that the gases are the driving force of volcanic eruptions and the importance of Carbon dioxide (CO2) in volcanic surveillance programs because it is the second major component of volcanic gases after water vapor, and its low solubility in molten magma silicitados-- making carbon dioxide (CO2 ) to escape with their ease of volcanic systems in depth.
Seismicity and deformation. For its part, the direction of PEVOLCA in relation to the seismicity that develops in the north of the island are reducing the number of earthquakes, repeating a pattern of depth, although there have been "quite often a type of volcanic signals (lp) in the Stations of the north coast and a new seismicity in the south to a depth of between 13 and 17 kilometers. " These phenomena are not significant at this time but "must be analyzed in case there is recidivism."
In this line, the strains remain in the horizontal direction is a lack of trend, most of them have a depression, and continues a pattern of stability in the area located in the Gulf. Tremor signal also no evidence that there is another source that the well-known eruption. For the National Geographic Institute is expected seismicity maximum of 4.5 on the Richter scale.
As to the impact on the sea surface underwater volcano, the area stands emission looks blue-green in their outer parts and dark central area is clearly defined. It should be noted that its position has not changed.

New support to the population. Finally, the Canary Islands Government Council approved at its meeting on Thursday the modification of the decree of Grants and exceptional measures to mitigate the damage caused by earthquake-volcanic crisis of El Hierro in order expand the coverage of these, according to ACN Press.
The new decree states that may be granted aid businesses, entrepreneurs and professional bodies active in the nuclei of the points and the Pozo de la Salud, both in the municipality of La Frontera.
Likewise, aid will be extended to business owners that were not included explicitly in the previous decree and part-time workers at 250 euros each. It also expressly provides that the maximum amount of aid will be $ 3,000 (one thousand euros to the activity and up to 2,000 per template).
Furthermore, the Governing Council also agreed to request the central executive exemption from payment of Social Security payments for the months of August, September and October 2011 enterprises carrying on business as usual in a permanent and localities affected by volcanic and seismic processes in the island of El Hierro and return, if any, of the contributions for those months already paid.
As explained by the deputy government spokesman and Communication, Martin Marrero, is ultimately, "that the State Government not to allow a limited extension in the payment of fees, as is reflected in A Royal Decree approved in late October, but proceed exemption, as it did because of the torrential rains that hit the archipelago in early 1999. "
Marrero said that "we are paying the aid that are pending in the Ministry of Economy, Finance and Security and which are about 60". "Over the next week to pay the aid and crews from 11 October to 31 December, in advance," he added.
In the same vein, on Thursday declared emergency as the draft Border Highway Sabin. The spokesman explained that "what is sought is the economic recovery that involves the construction of a highway and improved road communications to the island."
[Main image: the research vessel 'Ramon Margalef' through the stain caused by the undersea volcano / Pevolcan-Guardia Civil]

quote:

Op donderdag 24 november 2011 22:29 schreef Tokamak het volgende:
Er wordt zo langzaamaan steeds meer duidelijk over wat er aan de hand is. Op het westen van het eiland is al een tijdje een inflatie aan de gang. Daarnaast zinkt La Restigna juist de diepte in. Maar dat is niet alles, vandaag zijn er tekens die er misschien op kunnen duiden dat er binnenkort iets gaat veranderen. Daarover zo meer.

[..]

----------------------------

Echter, er zijn de afgelopen dagen wat nieuwe ontwikkelingen geweest die misschien op verandering kunnen duiden. Ten eerste de activiteit van gister en vandaag bij het gat in zee. Gister was er plots hernieuwde activiteit. Dit is mogelijk het gevolg van injectie van water in het systeem door dalende druk. (Water werkt als een rode lap op een stier.) Tegelijkertijd ontstonden er ook bursts op regelmatige basis. bwt had het hierover in de post boven mij. Armand Vervaeck (Belg / Volcano Report) zei er het volgende over:

[..]

Klinkt als een herhaling van de activiteiten in oktober. Er was echter n�g een ontwikkeling vandaag. Vanmiddag rond lunchtijd werd er melding gemaakt van een rotte-eierenlucht (zwaveldioxide) in Frontera, in het noorden. Carl Le-Strange (in discussie met Armand in het eerste artikel) had daar het volgende over te vertellen:

[..]

-------------------

Dit is slechts een van de meerdere scenario's. Het is op het moment nog steeds een beetje schimmig wat er kan gebeuren, laat staan wanneer, laat staan �f. Maar het wordt wel zo langzamerhand steeds duidelijker wat de vulkaan aan het doen is en wat de Hierrenen mogelijk te wachten staat. Het is afwachten.