El Hierro

[Florence]

Azores not on same fault line.  Some of the islands are not even in the same plate.  My 3 year old niece knows that.

[jand]

These comments are from someone who was watching the activity earlier this afternoon copied from Avcan FB.

I was this afternoon in La Restinga, and towards the 14 pm there was a period of intense activity in the area of eruption, with many pyroclastic and amounts of smoke... it is clear from the Hill of Naos Beach, the size of the area of bubbling is much larger than the last time that I saw... was also another close focusnot so active, a little bit more towards the coast. With cinematographic saw some stones jump, and it is spectacular!
 What struck me most was to see the focus of degassing which showed yesterday here in photos, is very close to the coast, just where it begins the reserve area integral marina, between La Restinga and Pinar. (

[jand]

Florence funny I dont know many 3 year olds that would be slighly interested in fault lines or tetonic plates is I am sure the majority of 3 year olds  would rather be playing with their toys or watching CBBC.

The Azores are above part of a triangle relating to the Canary Islands.

Physical geography

The archipelago of the Azores is located in the middle of the northern hemisphere of the Atlantic Ocean and extends along a west-northwest to east-southeast orientation (between 36.5°–40° North latitudes and 24.5°–31.5° West longitudes) in an area approximately 600 km wide. The islands of the Azores emerged from what is called the Azores Platform, a 5.8 million km² region that is morphologically accented by a depth of 2000 meters.[9][10]

From a geostructural perspective the Azores is located above an active triple junction between three of the world's large tectonic plates (the North American Plate, the Eurasian Plate and the African Plate),[10] a condition that has translated into the existence of many faults and fractures in this region of the Atlantic .[11] The westernmost islands of the archipelago (Corvo and Flores) are located in the North American Plate, while the remaining islands are located within the boundary that divides the Eurasian and African Plates.

[jand]

http://www.emsc-csem.org/#2

This shows the earthquakes in the greek islands for today El Hierro today looks nothing compared to this !!!!

[jand]

http://212.170.244.196/

Already this morning are smoking lava stones and steam on the sea and it looks like three seperate vents are active?

[jand]

The pyroclasts are huge that are errupting this morning you can actually see the floating in the sea.

[jand]

http://i1112.photobucket.com/albums/k499/sissel59/aserretyaneruptionforjaz1999.jpg

Diagram explanation of a Serratyan Erruption.

[jand]

Avcan FB Copied.

Well guys, you do not much enfadéis when you see that the report to publish today the IGN, what you say is; Yesterday there were 12 earthquakes associated with the eruptive phenomenon and none of them felt by the population... Mrs. white and Ms. López, I guess that when on Monday to go their Royal Highnesses will be informed by sr Santana from the point of view of civil protection, and you 2 from the scientific point of view explicándo what has happened in recent weeks and possible future... Dear SARS, all people who are here on the AVCAN page, is not that they are princes, are kings... As Kings as the wise men because they are those who pay the salary of the institutions and institutes that have us here in Bahia. We do not expect that they tell us things that go beyond the knowledge of science... We only hope that with all the data available to you guys, tell us what has happened in the last 10 days and at what points the trend. From December 10 to the IGN manifesto forecasts and future, have no interpretation of the data by IGN. The PEVOLCA as an institution and the IGN as an Institute you are missing to respect people who paid their salaries... And this explanation that we demand and deserve, we are going to give. (Translated by Bing)

[jand]

Video taken earlier this morning.

http://www.youtube.com/watch?feature=player_embedded&v=PVCjxMv5dGI

[jand]

Update 28/01 – 11:32 UTC
 - A lot of SLS this morning
 - NO earthquakes since midnight UTC
 - Harmonic tremor had a hard time surviving at 02:00 but picked up at 07:01 and remains minimally active until now.
 - Salvamar Adhara is out fishing lava balloons. Some stones seem to be really big today. Look at the size of the black stones in the water in relation to the size of the Salvamar Adhara.
 - Joke just reported that in 2 hours time (from 08:00 until 10:00) she has seen more than 300 SLS. She also pointed out that the lava baloons are surfacing further to Tenerife (to the left) than ever before. We think this is normal as it was described in the lava balloon document we have published a few weeks ago. Some SLS are only starting to float during the rolling down process from the vent to the base of the volcano. The reason was not explained, but it might be the breaking apart during the rolling process of a  heavier part enabling gas inside to start the floating process.

[fifi]

quote:Originally posted by jand

The pyroclasts are huge that are errupting this morning you can actually see the floating in the sea.

Im watching on the Movistar camera at the moment. Its really active at the moment.

[jand]

Fifi you were correct Bob had just had a nap and looks like now has 2 active mouths. It is still hard to keep up on everything but once again it is getting interesting as he seems to be fooling so many people.On Avcan FB there has been lots of discussions this morning we will all just have to wait and see what each new day brings.

[jand]

This picture was taken this morning and just behind the SLS you can see how large the stain has grown and there seems to be a darker stain now also just behind the SLS.

[jand]

There have been 8 earthquakes already since midnight the largest one a 2.4 mg.

http://www.ign.es/ign/layoutIn/volcaListadoCatalogoVer.do

Maybe this is the start of another swarm of earthquakes?

[jand]

Volcanocafe copied .

KarenZ says:

 January 28, 2012 at 21:45

Anyone know what the noise at 0-0.2hz is? Example for CFUE shown here: http://oi43.tinypic.com/2cd7kn9.jpg

(original http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CFUE_2012-01-28&ver=s&estacion=CFUE&Anio=2012&Mes=01&Dia=28&tipo=2)

But it is showing on other stations e.g. http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=EOSO_2012-01-28&ver=s&estacion=EOSO&Anio=2012&Mes=01&Dia=28&tipo=2

Reply

stoneyard says:

 January 28, 2012 at 22:19

Don't know, but it started gaining strenght yesterday morning... i almost could suspect renewed magma intrusion from deep, since it'seen on all other stations, but CHIE, As i commented earlier.
Reply


KarenZ says:

 January 28, 2012 at 22:35


The 0.2hz has been around for a bit as you say; but the <0.2hz?

Reply


stoneyard says:

 January 29, 2012 at 04:16

Just came off work, a bit chilly(-27c). I took a closer look quickly and it seems to follow CHIEs tremor pattern....

[jand]

Update 29/01 – 06:03 UTC
 - 8 new earthquakes since our last update. Even with an open vent, not only the number of earthquakes is increasing but also the magnitudes. This creates of course a situation which can change suddenly.
 29/01/2012    00:24     Depth 14 km        M 2.4    SW EL PINAR.IHI
 29/01/2012    01:10     Depth 14 km        M 1.0    SW FRONTERA.IHI
 29/01/2012    01:10     Depth 12 km        M 1.3    SW FRONTERA.IHI
 29/01/2012    02:08     Depth 12 km        M 1.2    SW EL PINAR.IHI
 29/01/2012    06:50     Depth 13 km        M 0.7    W FRONTERA.IHI
 29/01/2012    07:31     Depth 14 km        M 0.9    SW FRONTERA.IHI
 29/01/2012    07:52     Depth 19 km        M 1.1    W FRONTERA.IHI
 29/01/2012    08:25     Depth 16 km        M 1.1    SW FRONTERA.IHI
 - Harmonic tremor remains minimal, but magma is still flowing

[jand]

Note 433 AVCAN - earthquake activity - VOLCANIC - island of HIERRO - 29 January 2012-12: 45 pm peninsula - earthquake and volcanic activity continues moderate, with more microsismicidad and earthquakes located to have slightest sign of tremor, located from the coast at border and in the area of summits to Cala Pinar via the Julan and one in the mar de las Calmas. Today located more to the West. Also quite microsismicidad detected this evening but not located. Continues the signal of volcanic tremor in the eruptive zone of la Restinga, and although it is declining but still alternating periods with the tremor bass and quiet periods where it is unstable, with strong explosions hidromagmaticas and numerous ups and downs. Still leaving floating and smoky pyroclastic sea which at the moment the claim is more evident that the volcano is in eruption. Magnitude between 0.6 and 2.4. New earthquakes 18. Depth between 10.2 and 16 km (and two to 19 and 22 km). Yesterday 12. Yesterday 9. Today will be 9. In total van 12078 earthquakes located in El Hierro by IGN from 9: 00 pm of the day 19 July 2011 (Henry)

[jand]

Photo taken yesterday.

[jand]

Update 29/01 – 14:20 UTC
 - Joke (see image) has been to the CAP this morning and got some surprising news. Scientists were alerted by a an earthquake which occurred very close to the vent.  They have been around all night to discuss the phenomenon.
 We expect it to be the earthquake of M 2.4 at 00:24 with epicenter here. The earthquake can also well be seen on the IGN HT graph.

[jand]

Some photos from yesterday.

https://picasaweb.google.com/110327184570944806725/ElHierroJanuary292012?authuser=0&feat=directlink#5703057329240719234

[Florence]

quote:Originally posted by jand

Florence funny I dont know many 3 year olds that would be slighly interested in fault lines or tetonic plates is I am sure the majority of 3 year olds  would rather be playing with their toys or watching CBBC.

The Azores are above part of a triangle relating to the Canary Islands.

Physical geography

The archipelago of the Azores is located in the middle of the northern hemisphere of the Atlantic Ocean and extends along a west-northwest to east-southeast orientation (between 36.5°–40° North latitudes and 24.5°–31.5° West longitudes) in an area approximately 600 km wide. The islands of the Azores emerged from what is called the Azores Platform, a 5.8 million km² region that is morphologically accented by a depth of 2000 meters.[9][10]

From a geostructural perspective the Azores is located above an active triple junction between three of the world's large tectonic plates (the North American Plate, the Eurasian Plate and the African Plate),[10] a condition that has translated into the existence of many faults and fractures in this region of the Atlantic .[11] The westernmost islands of the archipelago (Corvo and Flores) are located in the North American Plate, while the remaining islands are located within the boundary that divides the Eurasian and African Plates.

The Azores do not share the same fault line as the Canary Islands (some of the islands are on the same plate only).  And as the above quite rightly shows that the Azores sit on a triple plate junction, this accounts for their regular earthquakes.  Nothing to do with El Hierro.  This may help:

http://www.mantleplumes.org/Canary.html

[jand]

The INVOLCAN registers a change of trend in the diffuse emission of CO2 by the island volcanic edifice of El Hierro

From mid-January is registered a slight upward trend in emissions achieved carbon dioxide the 904 ± 30 tonnes per day

Scientists from the Institute of technology and renewable energies (ITER), body dependent on the Cabildo Insular de Tenerife, and now forming part of the Institute Volcanológico de Canarias (INVOLCAN) have been reported to the direction of the Special Plan of Civil protection by risk volcanic of the community Autónoma de Canarias (PEVOLCA) that it is registering a change of trend in the diffuse emission of carbon dioxide (CO2) into the atmosphere by the volcanic edifice island of El Hierro during the second two weeks of January reaching are the 904 ± 30 tons per day in late January. This change in trend is observed after registering a downward trend of the diffuse emission of carbon dioxide (CO2) into the atmosphere by the island volcanic edifice of El Hierro from late November, when it reached the 2,398 ± 115 tons per day, until mid-January, when he came to record a rate of emission of 661 ± 37 tons per day. Point out that these values do not relate to the issuance of dioxide of carbon (CO2) that occurs through the underwater eruption of El Hierro, but the amount of carbon dioxide (CO2) emitted into the atmosphere through the surface environment (interface suelo-aire) that makes up the Meridian Island area of 278 Km2.

To obtain these results are carried out scientific campaigns, involving hundreds of measures of diffuse flux of carbon dioxide (CO2) in the entire surface of the island of El Hierro, in order to investigate changes in space-time of the diffuse emission of carbon dioxide (CO2) into the atmosphere by the island volcanic edifice of El Hierro. The interest and the importance of these works on diffuse emission of carbon dioxide (CO2 for volcanic surveillance) is that the information generated through these scientific campaigns
 These scientific campaigns may not be obtained through permanent instrumental networks.

Other scientific reasons that guarantee the interest of these works of surveillance are the role of the gas as driving force of the volcanic eruptions, the carbon dioxide (CO2) is the second major component of volcanic gases, after water vapor, while the low solubility of the carbon dioxide (CO2) in molten silicitados (magma) favor the escape of the carbon dioxide (CO2) with great ease of volcanic systems in depth.

These scientific campaigns have been able to realize the project MAKAVOL "Strengthening of the capabilities of I+D+i+d to contribute to reducing volcanic risk in the Macaronesia (MAC/3/C161)" is being co-funded by the programme for transnational cooperation of the European Union Madeira-Canarias – Azores (MAC 2007-2013) and the collaboration of Cabildos island of Tenerife and El Hierro.

INVOLCAN is an institution demanded unanimously by the Senate (2005), Parliament of the Canary Islands (2006) and Congress (2009) with the aim of contributing to the improvement and optimization of the management of the volcanic risk in Spain.

Bottom of image
 Time evolution of the diffuse emission of carbon dioxide (CO2) in the island of El Hierro (red circles) registered by the INVOLCAN and the number of localized daily earthquakes of magnitude greater than 1.7 by the national seismic network (IGN).

[fifi]

quote:Originally posted by jand

Photo taken yesterday.

Great photo. I was reading that the reason why there are so many Seagulls around the erupting vents is because of all the Jellyfish which seem to be thriving under those conditions. (A bit of useless information really but I did wonder why there were so many there).[]

[jand]

abc.es

The pieces have more than three meters in length and explode violently before sinking

The iron is still shaking with force. Large lava fragments have come to the surface during the last hours in the vicinity of the island of El Hierro as consequence of the submarine volcano that slightly more than three months ago entered eruption in the vicinity of the fishing village of La Restinga.

Some of the fragments of lava that have come near the island have over three meters in length and explode violently before sinking, reported today in a statement the Government of the Canary Islands. Most violent demonstrations occurred in the first hour of the day. Finally, about 1200 hours began to decline the emission on surface and in the afternoon only appreciated a ring of light bubbling.

Since the vessel Salvamar Adhara of rescue Marítino, has collected some of these fragments.

[jand]

OT relates to the earthquakes in Greece.

Santorini volcano (Greece) strong seismic swarm continues, scientist speak out, finally



Navigation:
All news about: Santorini volcano
Information about: Santorini volcano

Sunday Jan 29, 2012 17:01 PM | Age: 3 hrs

BY: TP




The location of the earthquakes SW of Santorini
 The highly unusual swarm of earthquakes SW of Santorini on the main fault zone that also defines the volcanic vents of the region continues with about 10 quakes larger than magnitude 2 during the past 24 hours. 2 of the quakes were magnitude 4 and 4.7, respectively.
 Greek media start to pick up the story and become increasingly interested:

Today the wall of silence seems to be falling as a major Sunday newspaper has exclusive interviews with a number of Greek seismologists and geologists on the matter and some information is now public.
 1. Inflation
From 1993 until 2010 there was deflation in the caldera of about 1cm/year, since the beginning of 2011 that has changed to inflation centered at a radius of 15 km on the north part of the caldera, rapid episodes of inflation have been recorded at intervals that coincide with bursts in seismic activity. Since August the intensity of the phenomenon warranted a rise to alert level 4 (red), where it has remained ever since.

2. Magma column
A displacement of 107 cubic meters has been located 1km north of the central island of Nea Kameni at a depth of 4 km, it is hypothesized that it is a magma intrusion, located right at the center of the most seismicity active part of the caldera.

3. CO2.
Co2 levels have jumped to 39 tonnes/day along with the emission of other gasses, a rising gas column has been observed outside the port of Thirassia in the caldera (the island on the west rim).

4. Water temperature.
The rise in sea water temperature in the caldera has been confirmed.

Most of the Greek scientists have brushed any concerns saying that conditions are normal and that has happened before, Euthimios Lekkas, geologist from Athens University, even said on TV that there is no danger even of a large earthquake in the vicinity of the island, the next day there were 3 earthquakes magnitude 5 and above, 50 km to the SW at the other end of the fault line.
 Noticeable exception, foreign geologists have a very different opinion, Michelle Parks, a geologist from Oxford, mentioned that the evidence points to something important, there is volcanic activity and the volcano is now potentially active at depth.
 Consensus is that the volcano has woken up in early 2011, but opinions differ mainly on the lines of nationality of the scientists.

More reporting at Santorini - seismic unrest 2011-12
---

[TamaraEnLaPlaya]

Fantastic picture.
Don't understand half of what is being said on the post, but it's addictive stuff!
Thanks.

[jand]

There have been four earthquakes more within 15 mins El Hierro.


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

[jand]

Tamara most of the posts are translated from Spanish sorry if some of it doesnot make sense its the translation from the translator on my laptop.

[TamaraEnLaPlaya]

Thanks Jand
Actually the 'translation' is quite amusing, it's some of the technical terms/data that flumox me. Doesn't stop me being interested though.
And only a few days ago you thought it was bye bye............. [8D]

[jand]

Update 29/01 – 23:35 UTC
 - The number of earthquakes is rising day after day which is not good news for El Hierro and the scientists. Even with magma still flowing out of the main vent, the pressure is building below the island. 16 earthquakes is the highest number since many weeks.
 Julio del Castillo Vivero has created a Google earth file showing the location and the magnitude of the earthquakes.