12/26 El Hierro Update

El Hierro Volcano activity report – Continued (mixed) upward deformation – New deformation data (Dec. 26)

Last update: December 26, 2013 at 12:10 pm by By

2013-12-26 12:07 UTC
To make the deformation graphs a bit easier to read for our readers, we have created a map showing the axis where the most lifting has been noticed until the latest incoming data. Most earthquakes did occur and continue to occur to the East and South-East of the HI08 GPS station

Screen Shot 2013-12-26 at 13.06.07

2013-12-26 11:00 UTC
IGN has just released new Ultra Rapid deformation data showing a continuous lifting in some parts and a stagnation in other parts.
The island inflates further with 1.5 cm in both HI08 (El Pinar) and HI09 (La Restinga) which brings the strongest inflation area 7 cm higher than prior to the crisis.
HI02 and HI03 (Sabinosa – El Golfo area) are stagnating or even deflating a little.
HI01 and FRON are lifting also another 1.5 cm.
Will be followed …

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Click on this image to see the details in full size

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Click on this image to see the details in full size

2013-12-26 09:16 UTC
Still only a few earthquakes since midnight, but this may change based on the latest data not yet included in the list.
Volcanic tremor (indicating magma movement, still deep below the island) has been recorded by many instruments on the island.
The Upwards deformation was also confirmed by the latest Involcan/Uni of Nagoya PINA GPS station. In order to reference the current deformation vs the deformations from earlier crisis, we have included the PINA Involcan/Uni of Nagoya GPS data sheet (unfortunately the Pre-2012 data is not included). The increase we witness now can indeed be called “spectacular”.

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2013-12-25 22:58 UTC
– A very interesting new episode in the current crisis. A calm seismic period but a continued deformation, both vertical and horizontal. In earlier crisis, once the seismic unrest stopped, also the deformation leveled or stagnated. No the lifting continues in most points as the latest IGN GPS stations are showing. All this means that this crisis is not over yet and that new seismicity is evident when the island is pushed upwards. The Upwards deformation data are really spectacular (U side of the graphs) – In only 3 days HI09 (La Restinga) lifted 6 cm! and HI08 (El Pinar) 5 cm. But not only the South-Eastern side of the island was lifted, but also most of the El Golfo area with an average of 4 cm.

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for more information, go to:    http://earthquake-report.com/2011/09/25/el-hierro-canary-islands-spain-volcanic-risk-alert-increased-to-yellow/

El Hierro – New Activity

El Hierro Volcano activity report – Strong new earthquake swarm has started at El Hierro

Last update: March 18, 2013 at 3:27 pm by By

013-03-18 15:27 UTC
– Thanks to ER readers Colin, Tommy, Chris and Vinch77 who have alerted us we can bring you this “breaking News”. A very strong seismic event has started at El Hierro. Check the HT graph and volcanic earthquakes list below (in a time-frame of only 10 minutes, 9 volcanic earthquakes have been listed by IGN + more to come) :

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2013-03-18 11:36 UTC
– The M3.8 earthquake which occurred yesterday to the North of Tenerife is a pure tectonic event as the hypocenter was reported at 51 km. There are more moderate tectonic earthquakes to the north of Tenerife.
– A small volcanic earthquake swarm occurred around midnight yesterday. Most of the epicenter below the central crater area of the island. No HT generated during that period. The strongest earthquakes are however visible on the CHIE graph

Screen Shot 2013-03-18 at 12.59.08

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2013-03-16 16:52 UTC
– A short period of seismic activity near midnight earlier today.

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2013-03-13 23:40 UTC
– The so called activity which started around 08:00 this morning ended at 18:00 UTC this evening. The same occurred yesterday. The logical explanation for this is human interference. Seismographs are very sensitive instruments and cars, people or other human activities can influence the recordings. We think this is the case here.

for more information, go to:    http://earthquake-report.com/2011/09/25/el-hierro-canary-islands-spain-volcanic-risk-alert-increased-to-yellow/

El Hierro Update 4/20

El Hierro Volcano : Green and Yellow – Pevolca changes alert status from Yellow to Green

Last update: April 20, 2012 at 12:23 pm by By 


Update 20/04 – 12:17 UTC
– Joke Volta’s images of today April 20. Calima (African desert dust fog) has finally gone and the pictures are getting more colorful.


Update 20/04 – 07:50 UTC
– NO listed earthquakes since midnight

Update 19/04 – 23:55 UTC
– A third El Hierro earthquake at 18:59 today. Magnitude 0.7, depth 12 km. Epicenter here.
– We have changed the title a little bit to reflect the current situation. No immediate risk to the island anymore, but still some minor volcanic activity (mainly earthquakes and a little degassing) around the main vent.

Update 19/04 – 15:21 UTC
– It looks like the volcano doesn’t like Pevolca or Mr. Armas :) !.  Almost together with Mr. Armas tweet, the ground was shaking again, a M1.2 earthquake at 13:01 UTC at a depth of 10 km, here

Update 19/04 – 14:09 UTC
– More details have been reported a little later, such as :
* the alert level of the island itself will change from Yellow to Green
* the area surrounding the main vent is downgraded from Red to Yellow (in other words, some limited vigilance remains around the volcano)
* The BIO Las Palmas (Oceanographic vessel), who made some extensive bathymetry last week, measured the depth of the cone at 86 meter.
* Today’s images of Joke Volta

Update 19/04 – 12:09 UTC
– In a short twitter message from the Cabildo de Hierro (office of Mr. Alpidio Armas),  the Green Alert of the entire island has been declared by Pevolca. Due to the very slim activity of the last couple of weeks (only faint stains and degassing), the Alert level change seems logical to Earthquake-Report.com

Update 19/04 – 11:03 UTC
– We have noticed one M2.2 earthquake at a depth of 32 km at 08:32 UTC at a very unusual place, which may explain the difference in depth.

Update 18/04 – 21:32 UTC
– ER reader John commented on our remark from this morning that we did not know where CHIE station was exactly. He said : found the location of CHIE it is Latitude 27.72700 Longitude -17.96070 . Information found athttp://www.isc.ac.uk/cgi-bin/stations?listr=Canary+Islands:Europe. Thank you John.
– 1 new earthquake at 14:37 UTC at a depth of 1 km (mostly IGN revises these shallow depths which has not been done so far)  ! Magnitude : 0.5. Epicenter here

Update 18/04 – 12:12 UTC
– Joke Volta images of today April 18, a “Calima” day (special regional weather type). Joke hasn’t seen anything special today, but nevertheless she continues to make pictures mainly to have a full series of visuals.

Update 18/04 – 10:52 UTC
– 1 earthquake since midnight. Magnitude 1.4 at a depth of 13 km. Epicenter here
– ER reader Leona has commented that it looks that the thickness of the CHIE HT line has increased since more than 24 hours now. We have the same feeling and have therefore increased the line with the same factor today and 4 days ago. Of course this should not mean anything, as it maybe temporary noise or even instrumental error margin. We neither have an idea where CHIE comes from. El Hierro has a lot of different instruments.

Comparison in amplitude of CHIE graph El Hierro

Update 17/04 – 14:40 UTC
– Both the Chile, Valparaiso Mw6.7 earthquake and the Papua New Guinea Mw6.8 earthquake can be seen on the CHIE El Hierro graph.

for more information and updates, go to:    http://earthquake-report.com/2011/09/25/el-hierro-canary-islands-spain-volcanic-risk-alert-increased-to-yellow/