El Hierro

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jand

#3120
July 01, 2012, 11:20:06 AM
People have posted a strong one just after 11:00.


he vuelto al fb ahora 11,12 grandote, desde las entrañas..


I returned to the fb now 11,12 big, from the bowels... (Translated by Bing)

about a minute ago · Like.

Luisana Tula Reboso Fuerte en los llanillos frontera 11:12 uff

Strong in llanillos border 11: 12 uff (Translated by Bing)

a few seconds ago · Like


www.facebook.com   AVCAN

jand

#3121
July 01, 2012, 11:42:36 AM Last Edit: July 01, 2012, 11:50:31 AM by jand
Now a 4.2 earthquake.

http://www.emsc-csem.org/Earthquake/earthquake.php?id=276235

Magnitude ML 4.2 Region CANARY ISLANDS, SPAIN REGION Date time

2012-07-01 10:11:40.9 UTC Location 27.66 N ; 18.13 W Depth 22 km

Update 01/07 – 10:42 UTC
- A new strong earthquake was felt by the population at 10:13 UTC. Based on the graph it must be certainly a M+3.  IGN just reported a Magnitude of 4.2 at a depth of 22 km. Epicenter in the Las Calmas Sea.

jand

#3122
July 01, 2012, 11:45:31 AM Last Edit: July 01, 2012, 12:16:13 PM by jand
Interesting Article.

http://www.geo.arizona.edu/~andyf/LaPalma/Submarine%20Slides.pdf

Have a look at the maps on page 12 and 14 very interesting.

fifi

#3124
July 01, 2012, 12:05:25 PM Last Edit: July 01, 2012, 12:21:24 PM by fifi
Quote from: jand on July 01, 2012, 11:45:31 AM
Interesting Article.

http://www.geo.arizona.edu/~andyf/LaPalma/Submarine%20Slides.pdf


Very interesting, and also very worrying. The threat of a submarine eruption or even an eruption on land  is nothing in comparison to the threat of local Tsunamis which have generated waves of over 150 feet in the past when there have been landslides in El Hierro.



Photo from the above  link showing the areas which have previously been affected by landslides.

Thanks for your vigilence jand. :)

jand

#3125
July 01, 2012, 12:20:46 PM
Fifi

As you know this has always been my worry (and still is ) that IF there is a landslide it could cause a small Tsunami and it could reach the other islands.

We must remember the wave could only be 2 feet high but still will be very dangerous because of the force it will have behind it as it reaches the other islands.

jand

#3126
July 01, 2012, 12:22:08 PM
Fifi Please can you add the photo on page 14 aswell .Thanks

fifi

#3128
July 01, 2012, 12:37:48 PM



Photo from page 14 as requested. :)

SurfJames

#3129
July 01, 2012, 13:20:10 PM Last Edit: July 01, 2012, 13:26:31 PM by SurfJames
I guess the size of the Tsunami would depend very much how quickly the rock mass fell away. If it was a slow sliding movement, then the wave would be small. If it was a sudden collapse, then the wave would be massive and start to move out across the Atlantic.

The concern, however,  has always been Las Palma and not El Hierro.

Canary Islands Active! El Hierro - Volcano Earthquake Tsunami potential

SurfJames

#3130
July 01, 2012, 13:59:11 PM
Here's a great website for budding Volcanists.   ;D

http://www.volcanolive.com/science.html

fifi

#3131
July 01, 2012, 14:07:28 PM
Thanks for the link Surfjames....something to get stuck into later. :) I read a report by Carracedo who is one of the leading Volcanologists in the Canary Islands and actually the studies suggest that when the Local Tsunamis were created in the past by El Hierro that they were not caused by a land mass falling but by gradual land slides and rocks falling.

jand

#3132
July 01, 2012, 15:16:14 PM Last Edit: July 01, 2012, 15:18:21 PM by jand
Thaks Fifi for posting the other map.

This is interesting La Restinga is showing inflation now.

Jim says:
July 1, 2012 at 13:31
Charts apepar to have just been updated – gps station at Restinga also now showing inflation

Reply

www.volcanocafewordpress.com

http://www.seis.nagoya-u.ac.jp/sagiya/canary_gps/SABI.pdf

jand

#3133
July 01, 2012, 15:21:54 PM
NOTE SPECIAL AVCAN - EVOLUTION OF THE SWARM EARTHQUAKE-VOLCANIC ISLAND OF HIERRO - 19 - 07/01/2012.In the map of seismicity of updated today, we have 81 earthquakes and form ball earthquake-volcanic swarm follows there, down to the SW of yesterday and the South with regard to tomorrow is, in fact the two strong earthquakes that are further to the South, and seems deeper are passed as the again, as in the first swarma rarity, or the model of density of the island of the IGN is not quite correct at that depth or the island is really a rarity there down, since it is not normal that the magma moves down. The latter are aligned mostly in NNW-SSE direction. (Henry) http://www.avcan.org/mapas/AVCAN3507.jpg?d=1341151369

www.facebook.com  AVCAN

jand

#3135
July 01, 2012, 16:10:30 PM
These figures have just been posted.

Inflation  7.5 cm in vertical and 6.0 cm in horizontal. ...

http://www.facebook.com/pages/Actualidad-Volc%C3%A1nica-de-Canarias-AVCAN/163883668446


jand

#3136
July 01, 2012, 16:44:48 PM
The activity of the magmatic process is similar to the last days and the deformation continues to grow


01-07-2012... 15: 12 — Ministry of economy, finance and security

** The value of the accumulated seismic energy reaches the 6.3x1011julios

The magmatic process initiated on June 24 on the island of El Hierro continues and behaves in a manner similar to the last two days, both deformation and seismicity.

In this sense the data transferred by the IGN to the direction of the Civil protection by volcanic risk (PEVOLCA) Plan, reflect, in the last 24 hours, the seismicity has been localized into a large area with more dispersion than the previous day and numerous epicentres in the sea. This area is located to the West of the island, and includes the Mar de Las Calmas and West of El Julan and so far they have located more than 1,250 earthquakes, 165 of which have been of magnitude greater than 2.7. It should be noted that this morning there has been an earthquake of magnitude 4.0 on the Richter scale and a maximum felt intensity III (EMS).

The depth of the earthquakes located in this series still staying around 20 kilometers, not observed migrating to the surface and the seismic energy released in the past 24 hours is similar to the released in the run-up. Its total accumulated value reaches a value of 6.3x1011julios.

The GPS of the IGN network recorded deformation continues to grow at a rate similar to the of the two previous days, both the vertical and the horizontal components, marking an apparent Center of pressure in the Mar de las Calmas. The total cumulative displacement from the June 24 and up to 24 hours of the day June 30, is of about 6 cm. in the components horizontal and up to 7.5 cm. in the vertical component. This increase has also been registered by stations that has the Involcan border and El Pinar.

Since the beginning of the current anomalous activity the IGN has intensified sampling of water and measurement of physical and chemical parameters in the island geochemical monitoring stations. In the analysis of samples of water, you could set a slight increase of CO2 that will have to confirm with the analysis laboratory of the samples collected. Other physical-chemical parameters are stable. Geochemical stations of continuous measurement in wells have not registered significant variation from their base values.

Involcan
Currently the data the Involcan getting on geochemistry applied to volcanic monitoring of El Hierro Island volcanic system delimit to the registration of the permanent instrumental geochemical network existing in the island of the Meridian with 5 geochemical stations of the ITER

The emission of carbon dioxide that is registering in the geochemical HIE01 station, located at the intersection of the three volcano-structural axes of the iron does not reflect anomalous values continuing the values of moving average daily log of the last 7 days of 3.9 grams of carbon dioxide per square meter. Not anomalous values of emission of carbon dioxide are being registered in the geochemical station HIE06 is located in the sumital of the Tanganasoga Volcano area, and whose daily moving average during the last 7 days log continues to be 0.8 grams of carbon dioxide per square meter. In both geochemical stations, it still does not detect hydrogen sulfide emissions.

http://www.gobiernodecanarias.org/noticias/index.jsp?module=1&page=nota.htm&id=149688

jand

#3137
July 01, 2012, 16:56:08 PM
 Julios Sebastian AVCAN As said, it appears that for the past earthquakes, it appears that moves slowly to the area of Sea of Calm but pointing to the Restinga, short, the initial intrusion would start below the zone of the Gulf, to ascend would go through it occidiental island at its center, would bend to the lighthouse area below Orchilla steps forward into the sea of Calm and would proceed to turn into the area of the Restinga. All a very winding road to the lava


http://www.facebook.com/pages/Actualidad-Volc%C3%A1nica-de-Canarias-AVCAN/163883668446

jand

#3138
July 01, 2012, 17:40:48 PM
Joke Volta seems to be a little unsettled her latest comments.

Translated.

Según esta informe, entiende, que apenas o no se han detectado indicios de gases al superficie.Es la deformación, que más me preocupa...Me ha gustado,que el Pevolca ha hecho referencia en su informe sobre la máxima de "haber sentido" en el caso del sismo valorado por fin en 4 de magnitud, de esta mañana.Ha sido un gesto de entendimiento en lo que comunica la población, pensando, que ha sentido un sismo de mayor magnitud...Sobre una eventual erupción me quedaron unos preguntas en el tintero, que quizás alguin que está bien informado en esto foro, me puede aclarar...Lo siguente: en aquel entonces, cuando hubo aquel erupción latente en el Mar de Las Calmas, en frente de Naos, los autoridades explicaron:"hay una zona/radio de 1,5 hasta 2km alredeor del punto de erupción, en que pueden caer piroclastos.Los eventualmente cenizas caen sobre todo a la dirección por donde se va el viento...Y ..ahora me pregunta: en esto caso, si un eventualmente erupción se realiza, y en tierra, ¿sería igual? Para cerrer quería decir, que estoy consciente, que los vientos reinantes en esta zonna donde ahora se dan los epicentros, son hacía el sur, hacía la mar, y me imagina que no es uno de los mayores riezgos....


According to this report, understand, that barely or not detected signs of gas to the surface.It is the deformation, which concerns me most...I liked, the Pevolca has made reference in his report on the maxim of "feeling" in the case of the earthquake finally valued at 4 magnitude of this morning.It has been a gesture of understanding in what communicates the population, thinking that he has felt an earthquake of magnitude greater...On a possible eruption, I left a few questions in the dark, perhaps someone who is knowledgeable in this forum, I can clarify...The following: at that time, when there was the eruption that is latent in the Mar de Las Calmas, in front of Naos, the authorities explained: "there is a zone/radius of 1.5 to 2 km alredeor of the eruption point, that can fall tephra."Eventually ash fall mainly to the direction where the wind is going...AND...now I question: in this case, if an eventually eruption occurs, and on land, would be equal? To close I wanted to say, I'm aware that the prevailing winds in this zones where now are the epicentres are towards the South, towards the sea, and I imagine that it is not one of the greatest risks.... (

www.facebook.com  AVCAN

jand

#3139
July 01, 2012, 18:17:58 PM
The sound of El Hierro from this morning.

This is the sound of El Hierro this morning, converted from the seismic trace on the link below, by GLP user Tardis Blue, using the link below.

http://www.01.ign.es/ign/resources/volcanologia/CHIE/imagenes_sismica/HORA_SP...

..and this section of that trace..

http://oi45.tinypic.com/2e4x99i.jpg

El Hierro - 1st July 2012 - 0843-0849 utc

jand

#3140
July 01, 2012, 21:06:38 PM Last Edit: July 01, 2012, 21:15:23 PM by jand

jand

#3141
July 01, 2012, 21:51:47 PM

jand

#3143
July 02, 2012, 17:04:48 PM
Look at the depths of these earthquakes.

It has been quaoted on another site that they all belong to Tanganasoga.

1153421 01/07/2012 03:30:38 27.7292 -18.0673 2.1km 1.3 mbLg SW FRONTERA.IHI – El Hierro
1153436 01/07/2012 06:43:47 27.7367 -18.0839 2.7km 1.1 mbLg W FRONTERA.IHI – El Hierro
1153343 01/07/2012 20:09:56 27.7202 -18.0700 2.5km 1.3 mbLg SW FRONTERA.IHI – El Hierro
1153365 02/07/2012 06:32:48 27.7280 -18.0714 2.2km 1.5 mbLg W FRONTERA.IHI – El Hierro


ign.es

jand

#3144
July 02, 2012, 17:07:35 PM
Update 02/07 – 13:09 UTC (updated 14:30 UTC) – New Pevolca report – New : Shallow earthquakes
Well, ... they seem to be often unfortunate. Just before a new press report arrives, a serious number of stronger earthquakes struck the island. Many of these earthquakes had the same epicenter at the western tip of the island.
- main message today is that seismicity (earthquakes) strongly decreased and that the majority of the vertical deformation was or halted or slightly reversed. All this occurred after the M4.0 has hit the island.
- Pevolca (IGN information) also said that they have recorded 2 shallow quakes (in between 2 and 3 km) with epicenter in El Julan, this after the M4.0 earthquake
- Involcan also refers to new values from GPS station Sabinosa (located in the Centro de Salud from Sabinosa). Click here to see the latest (Ultra Rapid) values from the University of Nagoya. The graph values are these reported by Involcan today.

www.earthquake-report.com

jand

#3145
July 02, 2012, 17:08:59 PM
Comment ER: no further details on the shallow quakes !
We have filtered the IGN database for shallow earthquakes and found indeed 2 shallow quakes after the M4.0 quake but also 3 other shallow quakes on July 1 before the M4.0 quake. These shallow quakes are also the first shallow quakes since the start of the new swarm.  In other words, these shallow quakes are more than just a detail to report. We are looking out to see some more explanations by means of the local press. The last 4 epicenters are all in the same area (at the El Julan side of the old Tanganasoga crater (we have included a video of the overflight of this historic crater)! All the earthquakes were weak to very weak. We have to stress too that none of the strong quakes happened in this area.
Earthquake-report.com has based his information on public available information of the IGN list
This information does not have to lead to any danger or panic. An eruption needs much more than a few shallow earthquakes (CO2 and SO2 gases + a bunch of other scientific data which are measured in realtime by IGN and which are not shared with the outside world). Additionally, IGN is a to be trusted scientific agency which would immediately inform Pevolca if additional action is needed.
01/07/2012    00:22:20    27.8088    -18.1712    Depth 1    km    M 2.0    NW FRONTERA
01/07/2012    03:30:38    27.7292    -18.0673    Depth 2    km    M 1.3    SW FRONTERA
01/07/2012    06:43:47    27.7367    -18.0839    Depth 3    km    M 1.1    W FRONTERA
01/07/2012    20:09:56    27.7202    -18.0700    Depth 3    km    M 1.3    SW FRONTERA
02/07/2012    06:32:48    27.7280    -18.0714    Depth 2    km    M 1.5    W FRONTERA

www.earthquake-report.com

jand

#3148
July 02, 2012, 17:59:53 PM

jand

#3149
July 02, 2012, 18:29:13 PM
Tanganasoga : the fearsome herreño stratovolcano

Guayota, thus called the guanches, the devil out of hell by the crater of Mount Teide, according to widespread legend of Tenerife Aboriginal. To explain the effects of volcanic eruptions in the Canary Islands giant, those primitive beings threw fable.

Thus, for the guanches Guayota came out of hell to kidnap Magec – del Sol-. Without the light of our star, let grasses grow and goats, of course, already didn't milk taking children. For this reason, when the giant planted dark days, the guanches were suffering serious consequences.

Contains the bimbaches, natives of the island of the Meridian, stored memory if a day had a relationship with the guanches, but certainly known herreño today know where is located the gate of hell on their island. At least is Sunday, pastor son of pastor and now converted on the Cabildo insular hunting guard, to attest to that.

The gate of hell is a mountain that is called Tanganasoga. He is a stratovolcanoas the Teideand presents up to five bunker with what this implies in testimony of its volcanic origin. But there is more.

There is what Sunday called the pit of Tanganasoga, a sort of slit towards the heart of the Earth that extends beyond the tolerable for human. "They went with bottles and they could not advance because fumes were insufferable," remember Sunday about an attempt to scan the hole in question.

Account Sunday Tanganasoga hole is similar to the southwest of the island's large volcanic tubes, but with a big difference: the Tanganasoga is not lying as those, but much more vertical.

This gate to hell, that would be, is the most dangerous option find an outlet that magma that strives to exit to the surface and being able to look from the front as to the liking of Guayota to Magec.

These days are not few those who have become his gaze toward the hole. An eruption in Tanganasoga is not advisable. It would threaten to cause serious losses in the western part of the If precarious building of El Golfo, specifically on Sabinosa and Los Llanillos, that while incendiaría the forest mass that connects with El Pinar.

Source: Diary notices | TINERFE FUMERO

Tanganasoga video

VOLANDO SOBRE CANARIAS - TANGANASOGA - EL HIERRO










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