El Hierro

Started by admin, October 12, 2011, 10:40:14 AM

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jand

#3181
July 08, 2012, 10:28:03 AM
Update 08/07 – 07:18 UTC
- the earthquake swarm yesterday evening had as a result that 113 earthquakes were listed by IGN (before this swarm, we wrote that yesterday would come out as the calmest earthquake day since June 24!). At least 7 of the earthquakes were felt by the people of El Hierro.
- 22 earthquakes so far today
- the depth of the hypocenters had no change at all today + NO additional shallow quakes have been reported
- Even with 22 earthquakes, the CHIE graph has visually returned to the pre-June24 levels
- The location of the epicenters is back to the western side of the island and the Las Calmas sea to the south of it (west of the lighthouse). The migration of earthquake activity towards the 2011 feeding system was reversed again.
- Almost all the vertical deformations as measured by the Involcan / Univ. of Nagoya were down this morning, this probably due to the earthquake-induced decompression after yesterday nights strong earthquake episode

www.earthquake-report.com

jand

#3183
July 08, 2012, 11:29:25 AM
Interesting article reporting that the Tsunami caused by the Lisbon earthquake in the17th Century could have formed the sand dunes in Maspalomas.

http://www.laprovincia.es/dominical/2011/02/06/maremoto-pudo-generar-dunas-maspalomas/351786.html

jand

#3186
July 08, 2012, 12:08:55 PM
Map of latest earthquakes.

http://cl.ly/3g2u0i340h2Y3F1v1m3x

jand

#3187
July 08, 2012, 13:52:47 PM
Update 08/07 – 11:38 UTC
- Based on what we see on the seismogram but which has not been reported yet by IGN, we think that the Magnitude will be M3.5 to M4.0! A number of these earthquakes are well felt by the people living in the southern part of the island
- It is probably too soon to talk about a major shift in the earthquake pattern, but we notify a migration of epicenters to the east and we see more depths in the 17 to 19 km layers.
- The earthquake swarm is still continuing at this moment

Update 08/07 – 11:34 UTC
- Joke just returned from an inspection of the Las Calmas sea. She could not see any special color in the water (but she said that the view was quiet bad).
- Joke also talked to a fisherman who said to her that he saw a stain this morning above the old vent. Joke checked it and could not confirm the story of the fisherman
- The recent swarm has suddenly boosted the number of earthquakes (54 since midnight have been listed by IGN)
- The recent swarm is still continuing and the center of the activity is still at the lighthouse side of the island

www.earthquake-report.com

jand

#3188
July 08, 2012, 20:15:03 PM
Update 08/07 – 16:47 UTC
Richard Wilson, a geologist who is specialized in volcano seismicity and who is also the main contributor to our "(almost) daily Worldwide Volcano Acitivity report", describes the El Hierro situation as follows:
Apparently a new round of seismicity at El Hierro (Spain) during the past 24-48 hours.  This is typical of intrusive activity, but not eruptive activity.  Typically eruptive seismicity is sustained and builds to a crescendo (and occurs at much shallower depth) before material is erupted at the surface.  Also, the up-down-up pattern in GPS data also suggests lateral spreading and intrusion rather than an eruptive pattern, which would also build and build and build.  Now, that being said, this is my interpretation, with very limited resources as far as instrumental data  and does not preclude a sudden shallowing and intensification of seismicity and deformation (and,...finally eruption!).  All instrumental signs of intrusive activity beneath a volcano must be watched vigilantly while they are in-progress in order to "catch" any of these "signs" of a forthcoming eruption.  This has been what is so intriguing/challenging for me to watch volcanoes since I was in my 20s (I'm 52 years old now!).

Update 08/07 – 16:29 UTC
- 89 terremotos or earthquakes listed by IGN so far today. 12 of these earthquakes had Magnitude of M3.0 or more. The strongest one was a M 3.6 earthquake at 11:13 UTC
- Pevolca issued a new report which has no real news in it.

www.earthquake-report.com

jand

#3189
July 08, 2012, 20:26:06 PM
More amazing sounds from the earthquakes El Hierro .

With thanks to GLP.

El Hierro 2042-2059 UTC, 7th July 2012

jand

#3191
July 09, 2012, 06:48:06 AM
Avcan are still discussing this Delaunay Triangle.

,,Seismic events in El Hierro with magnitude greater than or equal to 2.7 and seismic area through "Delaunay Triangulation", where each vertex is an earthquake between 7/7/2012 day and 7/8/2012 being the last earthquake located by Spain National Geographic Institute on 8 July at 22: 43: 10 (UTC) times. The situation depicted in the mapping schema can vary at any time; that is why it is good to take into account the last localized event. Look how much wider is the area of each triangle, less Seismicity in the area comprising, while when they are smaller, it means there is a greater concentration. Interior lines can serve us a little guide for guidelines, but care, are not conclusive and deserves to see well in reaching any conclusion. Be very vigilant / as to official communications and if they feel something do not forget to fill in the questionnaires of the IGN. (Barnabas,,



jand

#3193
July 09, 2012, 21:48:39 PM
‎1155623 09/07/2012 20:02:30 27.6791 -18.1211 22 3.1 mbLg W EL PINAR.IHI

jand

#3194
July 10, 2012, 06:33:04 AM
10/07/2012 04:04:34 27.6812 -18.0654 22 3.8 mbLg SW EL PINAR.IHI

jand

#3195
July 10, 2012, 06:36:36 AM
There have been 2  quakes aswell around the same time as the 3.8 in El Hierro in the south of Spain and Morroco.

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


2012-07-10 04:19:53.3 18min ago 34.29 N 5.24 W 8 3.6 MOROCCO
2012-07-10 04:10:40.0 27min ago 36.54 N 7.28 W 40 3.8 STRAIT OF GIBRALTAR
2012-07-10 04:04:34.6 33min ago 27.68 N 18.07 W 22 3.8 CANARY ISLANDS, SPAIN REGION

jand

#3196
July 10, 2012, 16:44:30 PM
Update 10/07 – 07:15 UTC
- 10 earthquakes so far today
- As ER reader Roland was mentioning earlier today, a strong quake occurred to the east of the normal epicenter area, close to the Tacoron coast, it was however at a depth of 22 km. This earthquake was well felt on the island.
- Deformations from the Univ. of Nagoya / Involcan seem to climb again (always difficult to determine because of the lack of date details)
- 10 earthquakes is the least we have seen so far at this time of the day, but as we all now, everything can change quickly at El Hierro
- Hopefully it will be today the last day of my PC migration problems (at least those who make working difficult)
- Yesterday Involcan disclosed data that they has measured increased helium about 1 week before the earthquake swarm started at June 24. Very interesting but rather late to report this to the public. May we expect from now on that these data will be reported earlier ?

www.earthquake-report.com

jand

#3197
July 10, 2012, 16:55:32 PM
Interesting article about El Hierro it is in English.

http://www.avcan.org/?m=Noticias&a=noticia&N=929

jand

#3199
July 10, 2012, 19:38:01 PM
Photos and Maps of Magma Chambers. (Its a pity that we dont know which are the ones under El Hierro at the moment).

https://www.google.co.uk/search?q=magma+chambers&hl=en&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=aWb8T8GtHqf80QXJlOyqBw&sqi=2&ved=0CE8QsAQ&biw=1366&bih=521

jand

#3200
July 11, 2012, 20:41:21 PM
This clearly shows the size of the mountain sides with the villages below.

Las Puntas El Hierro.

jand

#3202
July 14, 2012, 21:37:16 PM
There has been a 3.4 EQ in El Hierro.


‎19:52:43 27.7032 -18.1138 20 3.4 4 SW FRONTERA.IHI

jand

#3203
July 14, 2012, 22:30:01 PM
Update 14/07 – 21:13 UTC
- At 19:52 UTC, El Hierro got another (but luckily isolated) strong M 3,4 earthquake. The epicenter was at the usual lighthouse area and the depth was reported at 20 km. People at El Hierro are reporting that they have felt this earthquake.
- This last earthquake brings the total number listed by IGN today on 9.

www.earthquake=report.com

jand

#3204
July 15, 2012, 14:31:36 PM
Video of the erruption in La Palma October 1971.



VOLCAN TENEGUIA LA PALMA OCTUBRE 1971

jand

#3205
July 17, 2012, 10:00:30 AM
Update 17/07 – 08:07 UTC
-A new strong earthquake occurred 21 minutes ago. IGN has not listed this earthquake yet. Based on what we see on CHIE we estimate the quake to be in the M3 to M3.5 range.

1157170 17/07/2012 07:46:10 27.7046 -18.1308 18 km 3.0 4 SW FRONTERA.IHI

http://www.02.ign.es/ign/resources/volcanologia/CHIE/imagenes_sismica/HORA/CHIE_2012-07-17_07-08.jpg

http://www.02.ign.es/ign/resources/sismologia/www/dir_images_terremotos/detalle/1157170.gif

jand

#3206
July 20, 2012, 20:11:19 PM
Update 20/07 – 13:12 UTC
- Vertical deformations are increasing again at stations PINA and FRON. Very slight at FRON and appox. 1 cm at PINA
- 2 new earthquakes so far today :
01:02    Depth 20 km           M 2.0    SW FRONTERA
00:06     Depth 19 km           M 1.6    W FRONTERA

www.earthquake-report.com

jand

#3207
July 21, 2012, 17:51:56 PM
Update 21/07 – 15:56 UTC
- A M2.5 earthquake occurred at 09:10 at a depth f 23 km to the west of the lighthouse.

Update 21/07 – 09:15 UTC
- Nothing to report this morning except the CSIC seem to be in serious trouble as they can't pay part of their contractors anymore. CSIC is a huge government agency with a workforce of 15000 people, among them a big number f scientists. The problems are probably due to the very severe financial problems of the Spanish government.  We guess that's also bad news for the regional agencies like Involcan and other subsidized agencies like IGN. Politicians and science has never been an easy marriage and budget cuts are mostly easily found in such scientific institutions.

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

www.earthquake-report.com

jand

#3208
July 22, 2012, 10:21:28 AM
Very interesting article with photos maps and graphs about mega landslides in the Canaryislands.

It will need to be translated.

http://www.avcan.org/?m=Noticias&a=noticia&N=935

jand

#3209
July 23, 2012, 21:06:22 PM
Latest graph of released energy it is still showing a rise.

http://www.avcan.org/sismica/graficas/G1372.jpg?t=1343065363
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