El Hierro

[jand]

Swl

Sorry I am not an expert and cannot comment on your question I only post daily updates on what is happening at the moment .

I always try and add links and graphs to verify what is being posted.

At the moment as you can see there is discussions about the graphs on the other islands and El Hierro and it is being questioned about the new gas emmisions that they have trebled.

Personally after reading the posts from the priest that wrote about the erruption of Timafaya somethings were very similar to what is happening in El Hierro especially about the vents but this IMO and maybe incorrect.

Dr Elena on the map posted earlier of La Restinga actually ringed nine vents .

Each day is bringing something new what all this means we shall just have to wait and see.

[jand]

earthquake-report.com

- Joke was told today at the CAP, in La Restinga, that the Ramon Margalef is on its way to do a new bathymetry!

[jand]

Alan C says:

 February 5, 2012 at 18:24


@ Carl
 Please Sir
 I keep meaning to ask about the significance of the 0.59Hz frequency wrt siesmics.
 I'm the pupil now!

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Carl le Strange says:

 February 5, 2012 at 18:41

There are the three distingt frequencies that tend to pop up at the SILs of El Hierro. CHIE and CCAN doesn't show them due to the type of SILs, but the rest of them tend to do that. Especially EGOM and EOSO.
 The 0,59Hz frequency is believed to be of deep origin, ie. magma coming up from the depth. In shot, that there is new magma coming up via the hotspot mantleplume. This feature seems to be a part of other volcanoes to, last night we found it at Tunguroa volcano for instance.
 Here you can see it at EOSO together with the 0,26Hz deeper frequency.
 http://www.02.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=EOSO_2012-02-05_17-18&estacion=EOSO&Anio=2012&Mes=02&Dia=05&tipo=2&hora=17-18

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KarenZ says:

 February 5, 2012 at 18:35

@Carlos: one more for the collection:

http://oi43.tinypic.com/t9a2jb.jpg

Data source the same as above.

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KarenZ says:

 February 5, 2012 at 18:37

But on this one where IGN has not provided a depth, I used 0.5 km (total 41 mJ energy only at this depth compared to 9,200 mJ total for the period).

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[jand]

1125010 05/02/2012 16:07:08 27.7276 -18.0579 12km 1.7mbLg SW FRONTERA.IHI

Just S of the crater on Tanganasoga: http://oi44.tinypic.com/2r47o89.jpg (map courtesy of Google Maps)

[jand]

KarenZ says:

 February 6, 2012 at 07:25


Good morning all. Bob had a bit of a party after went to bed:

http://www.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CHIE_2012-02-05_23-24&estacion=CHIE&Anio=2012&Mes=02&Dia=05&tipo=2&hora=23-24
 http://www.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CHIE_2012-02-06_00-01&estacion=CHIE&Anio=2012&Mes=02&Dia=06&tipo=2&hora=00-01

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KarenZ says:

 February 6, 2012 at 07:31


Magnitude 6.8 NEGROS- CEBU REG, PHILIPPINES 9.964 lat 123.246 long 20.0 km Monday, February 06, 2012 at 03:49:16 UTC

http://earthquake-report.com/2012/02/06/very-strong-earthquake-close-to-la-libertad-negros/

As seen on: http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CFUE_2012-02-06&ver=s&estacion=CFUE&Anio=2012&Mes=02&Dia=06&tipo=1

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[jand]

Ot but look at the harmonics for today for the Santorini Volcano ?

http://www.geophysics.geol.uoa.gr/stations/realtime/THR3.htm

[jand]

Note 441 AVCAN - earthquake activity - VOLCANIC - island of HIERRO - 06 February 2012-12: 00 pm peninsula - earthquake and volcanic activity is continuing moderate seismicity located under the Tanganasoga and the area of summits. There is also a sismito in le mar de las Calmas. Besides looks microsismicidad detected but not located in the spectrogram. Continues the signal of volcanic tremor eruptiva de la Restinga, that area although it has fallen to almost disappear, but it is still there. Highlight that at midnight yesterday and early in the morning of today had a few hours in which they much increase in amplitude and the explosivity, with many explosions hidromagmaticas, then to dsiminuir rapidly, although not at once, but more or less gradual. Magnitude between 1.8 and 0.9. New earthquakes 5. Depths to 9.6, 11.8, 12.8, 13.0 and 13.6km. Yesterday 7. Yesterday 3. Today van 3. In total van 12145 earthquakes located in El Hierro by IGN from 9: 00 a.m. of the day 19 July 2011 (Henry).

[jand]

Map of seismicity of the last 6 days of three earthquakes of today (light blue), two have been low the next to the Tanganasoga in the Valley of the Gulf and the other from 1.3 in the Calmas.Ayer sea (Rosa) later had a couple of them more summits in the n-S alignment area from the Tangansoga towards the Julan. Antesdeayer plus 3.2 very near the coast in the area Lajial tip has had two very close to the mar de las Calmas and the other more inward into the sea. The other two were in the area of summits and the Julan on the other side of the tanganasoga giving a n-S alignment. Can also be seen very well other than we had not seen until now by the slopes of the Julan and continuity in the Gulf NW-SE and that if extrapolated, would pass by la Restinga (Henry).
3 hours ago · Like · 6

[jand]

Avcan FB

Buenos días, mucha gente esta mañana dice haber sentido varios temblores anoche, me imagino que habrá sido el tremor cuando empezaron las explosiones fuertes. También quería comentar que la boca de la mancha tiene hoy un color verde fluorescente muy definido, además sobresale por encima del mar, destaca bastante.

Good morning, many people this morning said to have felt several tremors last night, I guess that it will have been the tremor began when heavy explosions. I also wanted to comment that the mouth of the English channel today has a very defined fluorescent green color, also overhangs the sea, stands out enough. (Translated by Bing)

[jand]

Avcan FB Translated

In relation to this paragraph is short the interview at the Sr.Ortiz, I do not understand very well what you want to say to discuss all this, what conclusions out of all that.


«In addition, as points out, when it began volcanic process of El Hierro disappeared the seismicity in the rest of the Canary Islands. "»»The most active focus between Tenerife and Gran Canaria disappeared. And what happened then? therefore that an earthquake on the Atlantic coast of United States. And just to the next day, there was an earthquake felt in Gran Canaria. "And the next day again starts the activity between Gran Canaria and Tenerife, explains the scientist. "As says, these phenomena and their interrelationships are difficult to understand on a large scale, but inevitably, should be analysed in the same context.

[jand]

earthquake-report.

Update 06/02 – 13:10 UTC
 - Harmonic tremor increased significantly up to 02:00 and then started decreasing with a minimum commencing at 03:15 and remains like this.
 - There have been 4 earthquakes since midnight:
 06/02/2012    06:02    Depth 10 km    M 0.9    SW FRONTERA
 06/02/2012    06:59    Depth 14 km    M 1.3    SW EL PINAR
 06/02/2012    07:50    Depth 13 km    M 1.3    SW FRONTERA
 06/02/2012    12:09    Depth 17 km    M 1.9     W EL PINAR
 - Joke Volta told us the Guardia Civil helicopter was inspecting a much larger area than usual and sent us a photograph of the moment. The middle of the stain has a blue colour that can be clearly seen on the eruption webcam now. Click on image to enlarge.

[fifi]

Fantastic photos today. Click on "siguiente" at the top of the photo to see the rest of the photos.[]http://es-es.facebook.com/photo.php?fbid=343233539043378&set=a.343233229043409.87558.134042953295772&type=1&theater

[jand]

Fifi Thanks for the photos they are amazing  just posted one below to show now the difference in the colours of the stain I have no idea what the difference in colours mean??.




earthquake-report .

Update 06/02 – 18:02 UTC
 - The activity at the eruption site has been quite with almost a constant faint jacuzzi. We haven't seen SLS.  Should earthquakes continue, we would expect a rise in the activity.
 - INVOLCAN has just published an incredible set of today's photographs taken from the Guardia Civil helicopter flight, showing, as we commented today, a vivid blue stain, formed by gas release, with CO2 bubbles, and a bigger green stain, formed by nitrogen and sulfur gases, that lays inside La Restinga port.
 

[jand]

volcano cafe.

Canarion says:

 February 6, 2012 at 15:37

I dont know if anybody has read this, but here is an interview with one of the volcanologist of the csic where he says that in their (csic) opinion another deep submarine eruption did also take place in the north of the island. (its in spanish) http://www.canarias7.es/articulo.cfm?id=248562

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GeoLurking says:

 February 6, 2012 at 16:08

I can believe that.

We have had ephemeral evidence of it, but nothing we could nail down as proof. We do know that there were "fluid emissions" off of two points in El Golfo as evidenced on some of the bathemetry reports, though it never called them eruptions. Also, MRK and a few others noted "stains" that were dismissed as currents wrapping the southern stain around the island.

The quake plots even had a diagonal lineament pointed toward the surface to the North.

Now a volcanologist says that they think there was an eruption in the deep to the north.

Gee.... how about that.

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Carlos says:

 February 6, 2012 at 15:58

Yes I have readen it.
 First my grateful for mr Ortiz (Csic) to tell all they know.
 The problem is when he speaks of the 2nd phase it seems that eruption was changed towards northern and it was not so.
 When he speaks of the 2nd phase (at least from the seismic energy) mainly all this magma and energy continued erupting at LAS CALMAS. If you read him it seems like the eruption of Las Calmas was stopped... hahahaha
 He tell us Csic think the actual point of eruption is dead in no more than 20 days...
 As we all smelt he says thier models predict a 3rd phase of seismic activation...
 He said the actual Bob is dead soon and there is not pressure enough to continue in that point of emission.
 This is the possibility we all were watching... We hope the eruption will be continued at the actual point at Las Calmas sea. And after of all the movements we had in the last months it seems difficult the seismic energy and magma could find other path different of the actual... But the possibility is here.
 I hope this interview in the press to Csic forces to speak to the other institue IGN.

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Canarion says:

 February 6, 2012 at 16:11

Holaa!! XD I dont really think he actually meant this, what I think he meant is that after the renewed earthquake activity in october and november another simultaneous eruption took place deep in the north, this actually could be supported by a paper of the IEO of a bathymetry in the north where they marked two spots where a possible emission of materials could be taking place but deep in el Golfo waters, but its still interesting that he believes that the system has experienced a reactivation in the last days that might lead to a new eruption spot.

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GeoLurking says:

 February 6, 2012 at 16:17

Those two marked locations were not in "the deep," They were just off of two points of land in the water and marked as fluid emissions.

I think "the deep" in this case refers to the real "deep"... on the NNW end of the quake lineament where there was a group that tended shallower.

It I am correct, that would make El Golfo one seriously large volcanic complex. The "fluid emissions" are definitely related... but I don't think those are the ones being refereed to.

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Canarion says:

 February 6, 2012 at 16:34

Could such a deep spot be revealed with a bathimetry like the ones the Margalef makes in the south, or would a more detailed study of that area be needed to confirm a possible eruption spot there?

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GeoLurking says:

 February 6, 2012 at 17:00

I don't know if they went that far North. Even if they did, someone would have to publish the data in order for us to know. All we can do it make conjecture.

[jand]

Tyler Mannison says:

 February 6, 2012 at 16:29

1125145 06/02/2012 15:45:06 27.6997 -18.0613 12 Sentido 2.6 mbLg W EL PINAR.IHI

This earthquake was felt by the islanders it was a 2.6 mblg.

[jand]

Carlos says:

 February 6, 2012 at 17:47


Ramon Ortiz (CSIC): "We are in a third phase of volcanic process'

The scientist Ramon Ortiz, earlier this week in El Hierro, where he travels frequently to analyze the evolution of the volcanic process.

Silvia Fernandez / La Restinga

The expert said that CSIC volcanism in iron have been two eruptive since July, south and north. estimated that now we have a third phase of recovery that could end in another mouth. in Lanzarote and Tenerife is no record of eruptions with pauses for years.

- What time is the eruption of La Restinga?
 - An emission center is running out. You can take an average of fifteen days, ten or twenty-five be, but is in the final. And do not think there is a revival because the tide slows a magma that has no pressure to leave. But the party continues.
 - What do you mean?
 - We have detected two weeks ago a revival of the phenomenon to be monitored because if the trend continues it could result in a new eruptive locus.
 - However, since IGN is noted that the current seismicity response to a tectonic realignment after the eruption
 - This is tectonic seismicity. It has nothing to do. We work with models and of course now this seismicity does not conform to a model of relaxation. Was adjusted until Christmas and from mid-January has ceased to be a model of relaxation and appears to be reviving again, who is serving the same pattern of July. What will culminate in an eruption?, Do not know. What is on land or near the coast and see?, Do not know. But for the CSIC are now in a third cycle.
 - A third phase?
 - Yes The first began in July and ended in October, with the eruption of La Restinga. The second cycle was shorter. Began in October when many earthquakes accumulated after the eruption, and ended between 4 and 11 November. Time when we understand that there was a new focus of eruption to the north, in very deep water and not seen. Only observed for the signals that we saw in the system. And now, she is producing a third cycle, which could also stop erupting.
 - Seismicity What about now?
 - The magnitudes are very small. Of 2, 2.4 and up 2.8 degrees. Is having around 15 earthquakes per day in the north and in south, the latter being smaller. Furthermore, the deformation of 5 mm, has not subsided. If it goes below the island should deflate and return to baseline. As for gas, takes ITER, but according to them again increased CO2 emissions. This implies that increased fracturing and Co2 comes from magma. It's another thing that confirms that the story is not over.
 - Are there cases in other rash Canary cycles?
 - Of course. In Lanzarote, Timanfaya, lasted six years with many pauses. And in Tenerife have come to take three eruptions in a year. If the intrusion of magma is very large increases the possibility of new mouths.
 - How much magma speak in this case and how much you have left in the mouth of La Restinga?
 - At first there was talk of 100 million cubic meters, which is not much. But then very large earthquakes occurred, more than 4.5. To compress the rock so the volume should be increased and we esteemed him in a cubic kilometer, that to give you an idea is like a stone 500 kilos per capita in the world (6.8 million). As for what has gone, but not known exactly, we estimate that 240 cubic meters. Are 820, but does not have to leave everything.
 - What do you think Ramon Ortiz is going to happen?
 - I'll answer in order of probability. First, seismic activity is picking up. If this is accelerated again have large earthquakes, which could happen in 20 days and then you can open a new broadcast center in two or three months. Second, it may happen that the activity ceases, no more and that the magma is down.
 - The hypothesis of a new eruption can cause some alarm.
 - We are not pessimistic and do not want to scare anyone but we have to consider all scenarios to work with the worst possible. It tries to anticipate what might happen and so far we have done well because they have met all our forecasts. We are in favor of reporting what is really going to educate. In any case, although this new eruption reached need not happen anything. If you pass will know well in advance ..

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[jand]

Update 06/02 – 16:05 UTC
 - After reading reports of a people feeling shacking at 15:45 in Frontera, IGN published a M 2.6 Earthquake. IGN is publishing earthquakes not in chronological order, so we are updating along as they do.
 06/02/2012    15:45:06    Depth 12 km    M 2.6     W EL PINAR
 06/02/2012    15:26    Depth 12 km    M 1.8    SW FRONTERA
 06/02/2012    15:00    Depth 14 km    M 1.0    SW FRONTERA
 06/02/2012    14:11    Depth 11 km    M 0.7    SW FRONTERA
 06/02/2012    13:26    Depth 6 km    M 1.1    SW EL PINAR
 - Harmonic Tremor remains low, with a spike from the strong earthquake.

[jand]

Avcan FB>

According to the post of the INSTITUTO VOLCANOLÓGICO DE CANARIAS


"Today offers a clear phenomenon of degassing in the submarine volcano in La Restinga area." "Can also observe the condition of the stain of greenish volcanic gases that has literally stuck to the coast of the town entering even by the pier, carried by the tide and submarines, contrary to the strong prevailing wind eddies".

It seems that on the one hand out CO2 making the bubbling and the other gases Nitrogenados and Azufrados giving the greenish to react with the water of the sea. Either there is much current or is a clear example of two mouths, as the case of the eruption the Teide noses or Chaorra is where each mouth specializes in material (Henry).

[jand]

KarenZ says:

 February 6, 2012 at 20:42


Any one taken a peek at the GPS figures recently? http://www.ign.es/ign/resources/volcanologia/html/deformacion.html

LPAL, HI01 and HI04 are showing some movement.

Reply


KarenZ says:

 February 6, 2012 at 20:43


* correction: FRON-LPAL; FRON-HI04 and FRON-HIo1 are showing movement.

[jand]

ý1125149 06/02/2012 18:04:03 27.6928 -18.0470 11 1.7 mbLg W EL PINAR.IHI
21 minutes ago · Like · 2

Looks like this was felt aswell by the islanders see below copied from Avcan FB.


ý18:07 ruido, vibracion mas leve que el anterior

ý18: 07 noise, vibration more mild than the previous (Translated by Bing)

Reply

[jand]

Avcan FB Copied.

Earthquake hits 2.6 in the skirts of the Julan widely felt throughout the island and has noticed a lot in the North, it is possible that review you its magnitude upward... at least to see the partial data to detect it... If the sense you have, do not forget to fill in the questionnaire of the IGN which is attached to the end of this post.


1125145 06/02/2012 15: 45: 06 27.6997 - 18.0613 11.9 I 2.6 mbLg W EL PINAR.IHI - iron


Bernabe, I wonder something else on stage, well, the allocated size is the average of the three stations that have data... you can try add the three intensities and divide by 3


CTAB 0.05 337.0 S 15: 45: 10 620 - 0.3 0.10 1994.0 7.9 T__ a__ mbLg 3.2 19764460
CHIE 0.09 73.0 S 15: 45: 11 980 0.3 0.16 106.7 7.9 T__ a__ mbLg 1.9 19764469
CTIG 0.15 54.4 S 15: 45: 13 280 0.1 0.04 76.5 7.9 T__ a__ mbLg 2.5 19764456


(3.2+1.9+2.5)/3 = 2.6

[jand]

http://www.01.ign.es/ign/resources/volcanologia/www/dir_images_terremotos/detalle/1125132.gif

There has been a 2.1 mg earthquake between Tenerife and Gran Canaria today.

1125132 06/02/2012 13:37:39 28.0842 -16.1366 2.1 mbLg ATLÁNTICO-CANARIAS

[jand]

http://www.avcan.org/sismica/graficas/G801.jpg?t=1328563321

Avcan FB Copied.

In the graph of evolution of the released seismic energy accumulated or "Staircase of the devil" or Carnot function from the beginning of December of 2011 so far, is that the trend of releasing energy was linear, but from January 25, 2011 has slightly changed and after the earthquakes of yesterday, the thing is clearthe ladder back up indicating the possibility of a new phase or volcanic pressurization process, i.e., that we are entering a third fáse of volcanic activity and the earthquake of 3.2 almost confirms it...


To this must be added the readings of INVOLCAN which indicate that CO2 has risen in the last measure of diffuse CO2 and it seems that the vertical deformation is also increasing, to the less well reflect the GPS from Nagoya University in border.


http://www.seis.nagoya-u.ac.jp/sagiya/canary_gps/fron.PDF


Addition is the tremor, which seems that it is stopping from yesterday, as if the duct had clogged down departure and becoming more unstable pressure to enter the water, and Sarah parandose, now continues to decline, it would be according to the hypothesis of the possible new system for tamponade presurizacion...In short,... If it continues to increase the magnitude of the seismicity.. .no there will be no doubt. Before 24 h, we will leave doubts in this regard, we will see what happens. (Henry)

[jand]

http://www.youtube.com/watch?feature=player_embedded&v=c1f2rB5jOPk

Video taken yesterday of the flight over the stain.

[jand]

2nd video of the flight yesterday taken over the stain.

http://www.youtube.com/watch?v=c1f2rB5jOPk&feature=player_embedded

[jand]

Carlos says:

 February 7, 2012 at 05:54

 If Mr Pérez is so worried about the situation of the people of El Hierro, perhaps he might do a better paper explaing to these people what is the meaning of his diffuse emissions of Co2, his gps, and his diffuse emissions of So2, and how long might be this volcanic crisis. Telling to the people what is the meaning of his "objetive facts and measurements".
 What for do I want a lot of devices if after I dont tell to the people what is the meaning of these measurements and what is the traslation telling to the people how long and what is the actual situation of the volcanic-seismic crisis in the short-medium term?

Reply

Carlos says:

 February 7, 2012 at 05:55

University of Nagoya.

GPS La Restinga.
 http://www.seis.nagoya-u.ac.jp/sagiya/canary_gps/REST.pdf

GPS Frontera.
 http://www.seis.nagoya-u.ac.jp/sagiya/canary_gps/FRON.pdf

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GeoLurking says:

 February 7, 2012 at 06:13

Dude, If I gridded that and plotted it, they would have a flipping cow.

For all... the plot to pay attention to is the 3rd one on each set.

It seems that inflation has returned.

[jand]

Carlos says:

 February 7, 2012 at 06:34

Atention Ramon Margalef arriving to El Hierro.

http://www.localizatodo.com/mapa/

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Carlos says:

 February 7, 2012 at 06:38


Ramon Margalef is sealing towards El Hierro... It´s 40 km for arrive.
 Fecha: 7/2/2012 07:34:15
 Latitud: 27.765667
 Longitud: -17.412167
 speed: 10.7
 Rumbo: 263

Reply

[jand]

Avcan FB
By the way, the tremor has returned... past 3 am... looks pretty microsismicidad before the emergence of the same and then less and in addition is also quite explosive, with numerous explosions hidromagmaticas...(Henry)... http://www.01.ign.es/IGN/resources/volcanologia/CHIE/imagenes_sismica/DIA_SP/CHIE_2012-02-07_sp.jpg


http://www.01.ign.es/IGN/resources/volcanologia/CHIE/imagenes_sismica/DIA_SP/CHIE_2012-02-07_sp.jpg
www.01.IGN.es

[jand]

Alison says:

 February 7, 2012 at 15:33

Bob's tremor over the past couple of hours has been quite unusual.

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Carlos says:

 February 7, 2012 at 15:39

It seems the pressure is incresing as if something was going to explode...

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Diana Barnes says:

 February 7, 2012 at 17:27


Lets hope that " something" is not here!!!
 Evento Fecha Hora(GMT)* Latitud Longitud Prof.
 (km) Int. Máx. Mag. Tipo Mag. (**) Localización
 1125243 07/02/2012 13:58:44 27.7252 -18.0626 10 1.6 4 SW FRONTERA.IHI

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Tyler Mannison says:

 February 7, 2012 at 15:45

It looks like Bob having a spasm this morning.

http://www.02.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CHIE_2012-02-07&ver=s&estacion=CHIE&Anio=2012&Mes=02&Dia=07&tipo=1

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Alyson says:

 February 7, 2012 at 17:15


He seems to have been having quite a bit of action today, and the quakes have finally cracked 10km. They seem to be clustered SW El Hierro at the moment.

http://www.ign.es/ign/resources/volcanologia/HIERRO.html

Reply

[jand]

Update 07/02 – 15:08 UTC
 - 2 new earthquakes:
 07/02/2012    13:31      Depth 12 km        M 1.4     SW EL PINAR
 07/02/2012    13:58     Depth 10 km        M 1.6     SW FRONTERA

Update 07/02 – 13:55 UTC
 - The Ramón Margalef IEO Oceanographic vessel is back in town. He is making a new bathymetry session enabling IEO to measure the depth of the vent and to make new maps of the submarine cones. Meanwhile the local Canary Island press is quoting local volcanologists who are saying that IEO is not sharing the submarine research details with other (scientific) partners. It will at least take 2 to 3 days to get a new depth figure.
 - 4 earthquakes so far today
 07/02/2012    02:21      Depth 11 km        M 1.0     SW EL PINAR
 07/02/2012    10:29      Depth 15 km        M 1.4     SW EL PINAR
 07/02/2012    10:55      Depth 14 km        M 1.3     SW FRONTERA
 07/02/2012    11:37      Depth 13 km        M 2.3     SW EL PINAR
  - Harmonic tremor started to grow gradually after 03:00 as Ursula said in the comments (she lives in Australia and is looking at the HT graph and webcam while most Europeans sleep), winding down just before noon. Very suddenly everything restarted forcefully at 13:32 UTC, although nothing more than degassing can be seen at the surface.