Vulkaanuitbarsting bij Canarische Eilanden #5

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2013-04-08 20:00 UTC
- We bring you very good news! Voters have decided that NASAs earth 2012 image goes for El Hierro!
- After 5 rounds against 32 images the winner was announced today on their website, where the voting took place. In fact, the matchup was not even close, as El Hierro romped with 91% of votes!
- NASAs note on the story ends with a funny comment Perhaps a volcano will soon be popping some lava champagne to celebrate the win.

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2013-04-10 14:40 UTC
- PEVOLCA has met today and decided to lower the Yellow alert to Green Alert.
- They have now opened all the roads that were closed and insist that they remain vigilant and this is a green pre-alert phase as there are still some abnormal values.
- Diffused Co2 released to the atmosphere has decreased from 1,824 tons per day to 1,475 measured yesterday.
- Full press release click here

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Important Note: As of May 20 the information of volcanic activity on the island of El Hierro will be accessible from the direction : http://www.01.ign.es/ign/layout/volcaVolcanologia.do

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Op zondag 26 mei 2013 13:14 schreef Peter het volgende:

[..]

verwacht je nog onrust de komende tijd dan?

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Op zondag 26 mei 2013 21:54 schreef quirina het volgende:
Wanneer gaat de Teide een keer ploffen?

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2013-05-28 16:13 UTC
- Has been a rather long time before updating (returning from a holiday). Quiet impressive list with all weak earthquakes (strongest one being a M2.1 at a depth of 20 km). Yesterday May 27, NO earthquake were listed by IGN at all.

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2013-05-31 20:36 UTC
- NO continued strong action, only 2 isolated earthquakes.

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1215828 05/06/2013 05:35:38 27.7567 -18.3061 12 1.5 mbLg W FRONTERA.IHI [+]
1215792 05/06/2013 02:47:43 27.7657 -18.2153 14 1.7 mbLg W FRONTERA.IHI [+]
1215756 04/06/2013 15:45:43 27.7531 -18.0208 10 1.6 mbLg W FRONTERA.IHI [+]
1215685 04/06/2013 10:00:14 27.7996 -18.2473 15 1.9 mbLg W FRONTERA.IHI [+][bron]

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Op vrijdag 7 juni 2013 11:35 schreef Peter het volgende:
Toevallig komt het toeristisch zomerseizoen er aan..

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Op vrijdag 7 juni 2013 14:20 schreef DemonRage het volgende:
Gaat El Hierro nog een Santorini/Krakatoa doen?

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2013-06-18 16:26 UTC
- Reader Berry told us a little earlier today by way of the comment form, that he had seen some action which may not have been triggered by bad weather. After checking what he said, we believe that he was right.
The weak tremor was noticed during something more than 2 hours. It is normal again at the time of writing. No significant earthquakes were noticed during this tremor period. A non-volcanic explanation maybe some other disturbing source, but the signal looks real to us.

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2013-07-22 23:07 UTC
A long list today, merely because due to too many earthquakes and no need of urgency at El Hierro.
Almost all the ver weak) earthquakes today were right below the center of the island. We think none of them was felt by the islanders.

2013-07-15 10:07 UTC
Nothing really spectacular but still a bunch of earthquakes at El Hierro. When a crisis starts, these weak earthquakes are almost never listed. It is a pity that IGN stopped doing that. Publishing them, eventually in a separate list, would be great as this seismicity gives an even better view on the activity.
IGN has done this during the first pre-eruption crises. Why they stopped publishing them is one of the many unanswered questions.

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2013-07-27 13:14 UTC
2 more earthquakes since our last update. The avcan image below shows the epicenters of the last 14 earthquakes. All of them 9 to 13 km below see level.


2013-07-27 09:13 UTC
A lot of seismic activity since midnight (12) and the last couple of days. The earthquakes are however weak to very weak. Hard to say what will follow but me might have more attention for El Hierro today than the preceding days. The CHIE graph is simply USELESS for volcano followers like us. The amplitude of the events has been scaled back so strongly that even an earthquake is hard to see. This kind of behavior of the authorities was in earlier times reserved for some dictatorship states who did not want to get “bad news” outside the country.

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2013-07-29 07:36 UTC
Less earthquakes since our latest update, but 2 of the few remaining (M2.8 and M3.0) have been felt by the islanders.

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2013-07-29 18:32 UTC
The Magnitude of the earthquakes is gradually increasing. Today, only 2 earthquakes reported by IGN but with a Magnitude of M2 and M2.6. Epicenter in the El Golfo area and a second spot near the Lighthouse (Orchilla).
To soon to attract conclusions on the current events but the following days might see a further increase of stronger activity. Keep a look at it together with us and send a comment if something interesting is taking place.

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2013-08-02 15:49 UTC
For some it might be another boring update, but those who are following El Hierro from the beginning do know that it all starts with increased seismicity. What to retain about the below list ? Almost all of the 10 to 12 km depth weak earthquakes are happening in the El Golfo area (near the coast or below the coastal area. Only the M2.5 or more might be felt be people and we have only 1 of the list like that.

twitter:

pabloj_gonzalez twitterde op woensdag 07-08-2013 om 01:44:12 Now in early-view our paper in JGR: Magma storage and migration associated with the 2011–2012 El Hierro eruption http://t.co/89QDmQPqcp reageer retweet

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2013-08-09 15:47 UT
A bunch of (weak to very weak) earthquake below or around El Hierro since 4 days :

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Op maandag 12 augustus 2013 17:50 schreef quirina het volgende:
En nu?

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2013-08-12 18:04 UT
A big number of new (however weak to very weak) earthquakes. Most of them in the immediate vicinity of the island and almost all of them at a depth of 10 km. You won’t see them on the CHIE seismograph but we would not be surprised that some increasing action would start soon. (Thank you Chris and Leona for telling us). All what happens at the moment can only be recorded by instruments. People on the island will not feel it.

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2013-08-12 21:10 UT
And another 11 earthquakes since our latest update, which brings the total today up to 28. Even the CHIE seismogram is showing more and more earthquakes.

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2013-08-13 09:20 UT
Seismicity also continues today, at least many times more than the preceding weeks. Compared to the powerful earthquake periods in the past, the current earthquakes are really nothing. Nice that IGN shows us this list but keep in mind that the current weak earthquakes did not even show up in the lists at that time.

twitter:

teideano twitterde op dinsdag 13-08-2013 om 08:58:15 quakes are back to El Hierro #volcano. up to 71 since aug 10th. and counting. reageer retweet

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2013-08-13 22:36 UTC
Nature and volcanoes especially are really unpredictable. What yesterday looked as a new start of seismicity and more action has died down again today.

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2013-08-15 15:31 UTC
Less earthquakes than before but one serious M2.9 with an epicenter in the Las Calmas sea. Depth however at 16 km (deepest of all today’s earthquakes)

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2013-08-17 13:57 UTC
Seismicity report for the last 2 days

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2013-08-18 06:20 UTC
While on CHIE we can’t see almost nothing, another seismograph has started to show some consistent tremor. this may be caused by a badly working instrument, but the tremor shows like real at least. Strange however that there is ni increase in seismicity as the tremor shows a lot of small peaks. We will keep en eye on it during the day to find out whether it is real or wrong.

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2013-08-18 21:00 UTC
The tremor stopped later in the day as you can see on the seismogram below. We still do not know whether it was instrumental or real but without recognizable seismicity we think it might have been weather related or instrumental. No additional reported earthquakes since this morning.

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2013-08-20 15:52 UTC
Below the latest earthquakes at El Hierro. the so called tremor on the CHIE graph earlier today was an instrumental anomaly.

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Op dinsdag 20 augustus 2013 18:41 schreef downgrade het volgende:
M4.6 - Northern Mid-Atlantic Ridge
2013-08-17 09:19:10 UTC

???

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Op vrijdag 23 augustus 2013 15:20 schreef Pietverdriet het volgende:

[..]

de vraag is natuurlijk wat zich verplaatst, de hotspot, of de aardkorst er boven, volgens mij vooral dat laatste

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Op vrijdag 23 augustus 2013 15:40 schreef Pietverdriet het volgende:

[..]

De aardkorst glijd over de hotspot

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2013-08-27 21:00 UTC
Nothing really special happened the last couple of days. Seismicity is limited to 5 to 10 earthquakes a day, most of them at the 10 km depth layer. Today was a rather busy day with 10 quakes so far.

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2013-09-02 22:04 UTC
A lot of weak to very weak seismicity since our latest update.

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2013-09-15 12:00 UTC
A quick overview update of the last 10 days of earthquakes, no significant events or strong seismicity. A total number of 88 earthquakes between September 6th and today. With only 11 above 1.5 Magnitude. Activity is mainly taking place below the center of the island.

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2013-09-30 15:24 UTC
Since September 15, 160 earthquakes have been listed by IGN. A period of 2 weeks shows very well that the volcano is still alive.
Today, September 30 is a somewhat hectic day as we have noticed 21 earthquakes so far!, most of them at 10 to 12 km depth and in the middle of the island. 2 earthquakes have been felt so far, a M2.4 and a M2.7. Main reason that these relatively weak earthquakes have been felt : shallow and right below the island.

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2013-10-06 23:30 UTC
The increased activity is going on. The last 2 earthquakes have been felt by the islanders (Magnitude 2.2 and 2.4). Depths : no change

2013-10-05 15:24 UTC
In less than a weak the number of earthquakes is gradually increasing again. Some of the earthquakes are reported at a depth of less than 10 km and the epicenters are gradually moving to the southern shores again. We will be vigilant the coming days.

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2013-10-17 21:28 UTC
The usual number of weak to very weak earthquakes since our latest update. Many very weak quakes are now happening below 10 km and still under the island edifice.

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2013-10-19 14:54 UTC
A relatively strong swarm happened during a little more than 1 hour earlier today. The strongest earthquake was M2.1 right in the middle of the island (see map below).

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Op zondag 27 oktober 2013 22:46 schreef UpsideDown het volgende:
Afgelopen week op de top van El Teide (Tenerife) geweest, mooie ervaring. Zou deze ook weer actief kunnen worden? Zoiets lijkt me een ramp voor de bijna 1 miljoen eilandbewoners.

twitter:

teideano twitterde op woensdag 13-11-2013 om 15:01:41 Vuelve la sismicidad sentida a El Hierro. terremoto de 3,3 hace unos minutos. reageer retweet

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2013-11-30 14:48 UTC
Seismic activity since noon November 24.
I also want to express my gratitude to the many people who are following the action at El Hierro on a daily basis. Our many readers can be sure that whatever important event happens on the island, a comment from our readers is posted on this page and it alerts us immediately. We are convinced that the volcano island is not sleeping yet and that a new crisis is still a possibility.

twitter:

teideano twitterde op maandag 02-12-2013 om 13:37:02 Massive rainfall at El Hierro via @lbarqui #weather #rain #nature #waterfalls all around. http://t.co/tpBwJqfjRX reageer retweet

twitter:

LaCernidera twitterde op maandag 02-12-2013 om 10:52:38 Llueve incesantemente en las medianías del sur #ElHierro #ElPinar http://t.co/nq0OyFi4mT reageer retweet

twitter:

PrensaTenerife twitterde op maandag 02-12-2013 om 14:46:59 Cortado el carril de la TF-1 de acceso a Punta Prieta (Güímar) y el enlace completo por #LluviasTenerife. Precaución http://t.co/6wbQxAL8Du reageer retweet

twitter:

teideano twitterde op maandag 02-12-2013 om 16:57:14 Absolutely amazing rainfall at Tenerife http://t.co/CFIUPdfk1v" reageer retweet

twitter:

teideano twitterde op maandag 02-12-2013 om 23:36:39 @Missy_Page Tenerife island, about 20 miles from Santa Cruz. reageer retweet

twitter:

teideano twitterde op maandag 02-12-2013 om 17:24:08 Things are getting worse and worse. Pic: Vicente Bosch. http://t.co/NAqhR3OzFX reageer retweet

twitter:

teideano twitterde op maandag 02-12-2013 om 20:03:27 No rain right now, but some models predict a long night here at Tenerife. More than 200mm so far at some spots. http://t.co/vhi1g8CHgR reageer retweet

Imágenes del aguacero en Punta Prieta

En Varadero, cerca de Candelaria

twitter:

AlertaMeteo twitterde op vrijdag 06-12-2013 om 20:18:06 Impresionante esta imágen que nos llega desde #Tenerife - #España. Potentes lluvias que ponen en #alerta a la isla. http://t.co/Lb4RXcBw5C reageer retweet

twitter:

teideano twitterde op zaterdag 07-12-2013 om 09:33:56 Another #amazing pic from yesterday #storm at #tenerife. #meteo #weather. Author is Luisma de León. http://t.co/xRwOR7iusR reageer retweet

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1249092 08/12/2013 02:23:04 27.7204 -18.0329 12 2.0 mbLg SW FRONTERA.IHI [+]
1249003 07/12/2013 08:12:47 27.7206 -18.0323 11 1.7 mbLg SW FRONTERA.IHI [+]
1248956 06/12/2013 23:18:45 27.6801 -17.9915 20 1.8 mbLg SW EL PINAR.IHI [+]
1248951 06/12/2013 23:00:43 27.7225 -18.0297 12 1.5 mbLg SW FRONTERA.IHI [+]
1248894 06/12/2013 05:33:03 27.7225 -18.0250 12 1.7 mbLg SW FRONTERA.IHI [+]
1248889 06/12/2013 05:09:11 27.7115 -18.0353 13 1.7 mbLg W EL PINAR.IHI [+]
1248547 04/12/2013 04:02:28 27.7486 -18.2499 11 2.2 mbLg W FRONTERA.IHI [+]
1248519 03/12/2013 13:31:50 27.7179 -18.0041 16 1.7 mbLg NW EL PINAR.IHI [+]
1248274 01/12/2013 22:00:20 27.7226 -18.0187 12 II 2.3 mbLg SW FRONTERA.IHI [+]
1248271 01/12/2013 21:10:51 27.7689 -18.0325 23 1.6 mbLg NW FRONTERA.IHI [+]
1248162 30/11/2013 23:04:20 27.7255 -18.0129 10 1.7 mbLg SW FRONTERA.IHI [+]
1248123 30/11/2013 15:47:26 27.7228 -18.0294 12 1.5 mbLg SW FRONTERA.IHI [+]

twitter:

teideano twitterde op dinsdag 10-12-2013 om 12:50:53 #meteo #weather Tenerife and La Palma both to expect for torrential rain, up to 60mm in 1 hour. http://t.co/VZoIDvKBL5 reageer retweet

twitter:

canariesnews twitterde op dinsdag 10-12-2013 om 19:08:57 New post! La Palma on 'Red Alert' for rain and bad weather - http://t.co/lYAb7LRSjI http://t.co/J2nOIotfvP reageer retweet

twitter:

teideano twitterde op dinsdag 10-12-2013 om 14:11:23 Muelle de La Estaca,El Hierro a las 12.30 #alertacanarias #meteo #weather Foto vía cazatormentas, Arselumaco. http://t.co/LPx71maCuS reageer retweet

twitter:

InfoMeteoTuit twitterde op woensdag 11-12-2013 om 11:01:50 Espectacular rayo cazado al norte de #Tenerife foto Viecente R. Boch vía @MeteoRTVC #Canarias #FMACanarias #Tormenta http://t.co/j3PNs3hDMx reageer retweet

twitter:

teideano twitterde op woensdag 11-12-2013 om 11:42:19 Amazing #storm over Tenerife right now. #meteo #weather #nature via @sergiovelascom: Rayo en Observatorio del Teide http://t.co/I1E75QVB8k" reageer retweet

twitter:

teideano twitterde op woensdag 11-12-2013 om 11:58:24 Another pic from the storm. #meteo #weather #nature by Carlos Hernandez. http://t.co/11EgQRsq0H reageer retweet

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1250093 14/12/2013 21:42:09 27.7255 -18.0179 13 2.6 mbLg SW FRONTERA.IHI [+]
1250094 14/12/2013 21:40:51 27.7224 -18.0127 12 2.2 mbLg NW EL PINAR.IHI [+]
1250068 14/12/2013 12:59:54 27.7295 -18.0106 9 1.6 mbLg SW FRONTERA.IHI [+]

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2013-12-18 18:47 UTC
Readers Berry and Leona have told us earlier today that the CHIE graph is alive again. The sensor has however been replaced by the CTIG seismograph.
Only 2 earthquakes since our last update on December 14!

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2013-12-21 09:37 UTC
Activity below the island has almost arrived at a standstill as we had only very few earthquakes the last week.
- We have just archived Part 59 of the El Hierro story (we still believe that a new activity period can appear the following days, weeks, months …). Link at the bottom of this page.

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2013-12-22 09:21 UTC
A sudden increase of seismicity. Too soon to talk about a new crisis, but with 5 2+ Magnitude earthquakes on 13 quakes, this looks to be more than the usual small -M1 quakes we have seen the recent weeks. (Thank You Leona for alerting us).
Stronger earthquakes are within reach today.
Most epicenters are located in the El Golfo area and some of them may even have been felt by people living in Frontera.
The depth is normal for all beginning activity. As long as the hypocenters (breaking point generating the earthquakes) is not below 10 km, looking for an eruptive episode is not realistic.
Shaking from earthquakes is starting to be dangerous from M3 on for landslides (steep cliffs area) and from M4 on for structures (mainly cracks in walls and NOT collapsed houses).



2013-12-22 10:22 UTC
The seismograph screenshot from La Restinga shows the current activity. Apart from the listed earthquakes, we also see a lot of micro-seismicity (mainly by comparing the graphs from the past days). Please note that most of the oscillations are coming from human triggered events (seismographs are very sensitive). The thicker tremor line started however when seismicity increased.

2013-12-22 15:20 UTC
As said in our prior updates a magma intrusion is currently going on below El Hierro. So far the strongest earthquake is a M3.2 at 12:16. Stronger earthquakes may be expected. The depth remains at a safe level.

twitter:

teideano twitterde op zondag 22-12-2013 om 16:39:13 Seismicity at El Hierro is back again, up to 3,2M 20 quakes so far today. #nature #volcano #geology http://t.co/9QQUE3a1Vs maps available reageer retweet

twitter:

teideano twitterde op zondag 22-12-2013 om 17:01:06 Ultimo terremoto localizado en El Hierro a travès de la #app Avcan Quake http://t.co/1TOiyC3pmE reageer retweet

twitter:

teideano twitterde op zondag 22-12-2013 om 17:03:31 Otro terremoto más localizado en El Hierro M2.7 con la #app Avcan Quake. Día de actividad importante. http://t.co/ef6p99kjLX reageer retweet

twitter:

teideano twitterde op zondag 22-12-2013 om 17:36:54 Otros 4 terremotos más en El Hierro. imagen del ùltimo de ellos, de M2,2 a travès de la #app Avcan Quake. http://t.co/ogSnrRj7Qf reageer retweet

twitter:

teideano twitterde op zondag 22-12-2013 om 18:08:02 Shaking and counting. El Hierro reaches 30 quakes today. Last three were M3, M2,7 & M3,1 #volcano #geology reageer retweet

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Op zondag 22 december 2013 18:48 schreef Frutsel het volgende:
op naar de mooie plaatjes voor Kerst

twitter:

MeteoConsult twitterde op zaterdag 21-12-2013 om 07:34:31 Een kerstboom gesignaleerd in de neerslagpluim voor eerste kerstdag..... Oei.. dat wordt veel regen. http://t.co/zjIx5PIPmS reageer retweet

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2013-12-22 19:44 UTC
Our opinion written during the first update this morning became true, a new magma intrusion is occurring below the island. Some people are so excited about the new activity that they are spreading some kind of minor panic. We emphasise that IGN did a great job in following up all other crisis and that they are standby 24 hours a day. The location were they are watching the instruments (Madrid or El Hierro) is totally unimportant at this moment. The earthquakes are still in average in between 13 and 15 km with NO fast progression to a shallower depth. IGN will increase the number of instruments (some were apparently broken after the bad weather) and will certainly be replaced.
We will of course NOT comment on every earthquake BUT we are following up what happens and will report asap when something new and relevant is happening (as you now of course).
- The activity as it started this morning is intensifying. Nobody knows what wille happen the next minute, hour, day or week. It can suddenly stop or it can continue.If it continues we expect even stronger earthquakes than the ones so far, this based on earlier crisis. Good to repeat that only earthquakes (below first 10 km and later 5 km) will throw another light on the current situation.
- 41 earthquakes so far today IGN reports 4 felt by the islanders but we think there are more felt, but only 4 reported at IGN.
- The epicenters of the last 10 earthquakes are mainly at the eastern part of the island, a totally other section than the one earlier activity was noted. This brings a new uncertainty in the field as we do not know the resistance of this part (we know it from other parts).
- The intrusion has calmed down since a couple of hours (see the tremor line below getting thinner, but a new strong quake can change everything again pressure building up until it breaks). Do not hesitate to comment on the bottom of this page if the people following this activity are seeing something strange again. A 0 depth is (by the way) in 99.9% of the cases an instrument error).
- Something relaxing for our friends at the US and South-American East coast : We know that a lot of people are fearing a collapse of the island, but what is happening today occurs at the opposite end of the island.

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2013-12-23 08:49 UTC
- Confirmation of the current Magma thrust below the island comes from the deformation data from Involcan University of Nagoya (Prof. Sagiya) El Pinar GPS station. The thrust has led to an upwards deformation of at least 2 cm (Ultra Rapid data, to be confirmed later). De deformation to the North-East is less than a cm.

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2013-12-23 13:28 UTC
- Involcan (Nemesio Perez) and IGN (Carmen Lopez) are saying the same as we have done since the beginning yesterday
- 58 earthquakes listed by IGN so far today
- Location last earthquakes (El Pinar area) = unchanged
- Hypocenter depth : 15 to 18 km = unchanged
2013-12-23 09:32 UTC
- If you live in El Pinar, you do want to see the epicenter of the last set of earthquakes below. Almost all the current seismicity is concentrated in the direct El Pinar area (red squares). The initial earthquakes started in the El Golfo area (green squares are the older quakes). But, we repeat, at the current depth there is no immediate risk. If IGN would see any danger, they will act swiftly (we are convinced about that). As stronger earthquakes are expected we would advise people living in El Pinar to read our Be Earthquake Prepared section

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2013-12-23 18:02 UTC
- We just had contact with Joke Volta who lives in El Pinar, exactly the area with all the current epicenters. She said that she felt nothing important, just some light shaking now and then.
- If we look at the IGN deformation graphs (see below), 4 GPS stations are showing lifting deformations of around 2 cm HI08 is normal of course (the current epicenter area), but Hi09 (La Restinga part of the island), FRON (Frontera) and HI02 (El Golfo) who have almost the same upper deformation. All other stations on the island remain unchanged (please note that HI10, also on the lifting axe, has stopped reporting earlier this year).
- 99 earthquakes so far today !

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2013-12-24 09:50 UTC
- Relatively few earthquakes today (less than yesterday)
- some information for both ends of readers. Those on the island who merely want to live their safe live and want to enjoy tourist spending : less earthquakes. Those (almost all from other places in the world : it is not over yet.
- The seismograph image below shows a strong earthquake at 06:17. If you are looking in the list for this earthquake, you will be surprised that it is only a 2.4 Magnitude. Why such a big line on the graph then? Because of the depth of 9 km. The seismograph is the confirmation that the depth must have been true (in seismology error margins are normal – in preliminary readings).
- Some activity is taking place offshore at the east of the island.
- Magma wint gradually into a more shallow layer. It went up approx. 2 km (from 15 to 17 km towards 12 to 15 km (last 5 earthquakes).
- The seismograph image shows at the end some more tremor indicating a further intrusion of magma. These quakes are not yet showed on the list.
- De El Pinar GPS deformation data is showing a Northern deformation of nearly 2 cm. More lifting of a bout 1 cm.
- The IGN deformation data are showing a further lifting of 2 cm! on the HI09 (La Restinga) GPS and a 1 cm lifting of the El Pinar HI08 GPS. this means lesser lifting in El Pinar and more lifting in La Restinga than the prior 24 hours. These readings are confirming what we see on the seismicity map.
- In terms of safety on the short term, we are convinced that a PEVOLCA will meet soon and will publish a report afterwards. (PEVOLCA safety board of the island consisting of IGN, INVOLCAN and the local and national authorities)

twitter:

teideano twitterde op dinsdag 24-12-2013 om 10:06:56 200th quake at El Hierro in 48 hours. swarm still going on. #volcano #geology #science #nature http://t.co/lLCHbixxKm reageer retweet

twitter:

teideano twitterde op dinsdag 24-12-2013 om 11:49:22 http://t.co/hpR68VLDjj Video showing the evolution of the current seismic swarm at El Hierro. #volcano #geology #science #nature reageer retweet

Enjambre sísmico en la isla de El Hierro (22-23 de Diciembre de 2013)

twitter:

teideano twitterde op dinsdag 24-12-2013 om 11:28:03 Uplift detected in El Hierro. More than 2cm in 48 hours. New intrusion? #volcano #geology #science #nature http://t.co/lIzajTsKTx reageer retweet

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2013-12-25 09:31 UTC
- Back to the pilot modus? No more listed earthquakes since 03:46 UTC, although we still see some activity and even some tremor on the La Restinga seismograph (we doubt that the IGN list is complete!).
- A very dispersed image of depths, ranging from 12 to 19 km (average 14 km) based on the latest listed earthquakes
- The weakening can however not be seen on the latest IGN deformation map where La Resinga HI09 (IGN) shows a lifting of another 2 cm (same than the prior 24 hours) and El Pinat also 2 cm up and a push to the North.. If this lifting will continue, this means that the accumulated energy will try to release itself with more earthquakes. Unfortunately, we only have GPS deformation data once a day.
- The University og Nagoya / Involcan GPS station is reporting an even stronger lifting to the North of the El Pinar GPS station. Both IGN and Uni of Nagoya are indication that the pressure is building further up below the island.
- Also important to mention is that the magma source below the island should be in between La Restinga and El Pinar. Why ? because the NS deformation charts of IGN is showing a thrust to the North in El Pinar and a thrust to the South in La Restinga.

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2013-12-25 19:51 UTC
- For passing by-ers who are looking only at the earthquake list, it looks like everything is over again. We are not convinced that this is the case. We are constantly looking for patterns, mainly because of the strong continuing deformation as reported this morning (by both IGN and Uni of Nagoya). The La Restinga seismograph is almost flat which explains also the only sporadic earthquakes on the IGN list. We keep you updated.

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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

twitter:

teideano twitterde op vrijdag 27-12-2013 om 10:51:23 Seismicity down, inflation still up at El Hierro. Any suggestion, folks? #volcano #geology #science #nature http://t.co/n2Rgh0zjn3 reageer retweet

quote:

2013-12-27 23:47 UTC
IGN said in an interview to Diario El Hierro tonight that they are far from convinced that the M5.1 earthquake from this afternoon was the result of magma intrusion but that the origin of the big earthquake may have been the result of the accumulated deformation and pre-existing fractures.
ER : we trust IGN on their analysis, as they are specialized people having much more data than we can see in the public forum. A lot of questions remain however which will probably be answered on a later date.

twitter:

teideano twitterde op zaterdag 28-12-2013 om 02:14:39 222Rn measurements at one of our stations in El Hierro.Precursory activity b4 the earthquake? #volcano #science http://t.co/9prar7IssE reageer retweet

twitter:

eruptionsblog twitterde op zaterdag 28-12-2013 om 02:19:38 @teideano Definitely an interesting trend. reageer retweet

quote:

2013-12-28 08:58 UTC
No more spectacular earthquakes during the nightly hours.
The New deformation data is showing a somewhat identical picture than yesterday. Stabilizing (or slightly increasing) horizontal and vertical deformations in the El Golfo area and mid-Island stations BUT continued lifting and/or horizontal movement of the El Pinar and La Restinga GPS stations. Lets hope IGN or PEVOLCA will give their views on this in a report later today.
New today is the HI10 station (until today, HI10 was not present on the deformation maps). HI10 (El Julan area) shows the same strong increase than El Pinar and La Restinga, even more as the total lifting deformation since the beginning of this crisis is 10 cm!
What does this mean ? It means that there is still a magma source below the south-eastern part of the island, but without generating earthquakes.
Something else we suggest is that, because of the stabilized western GPS stations, IGN was right in stating that the strong earthquake from yesterday afternoon may have no direct relation with the lifting of HI08, HI09 and HI10.
Does the continued south-eastern deformation will lead to more earthquakes in that part of the island – not necessarily as even more lifting in other places did not necessarily led to earthquakes neither. One additional reason to say this is that, though the lifting was strong at El Pinar, La Restinga and El Julan, only the greater El Pinar area lived through a swarm of earthquakes.
The next hours and days will be “tension” days as everybody will be searching for more clues.
Geofon Germany has published the focal mechanism of the M5.1 earthquake and this shows a strike-slip earthquake (see image below)

quote:

Op zaterdag 28 december 2013 11:37 schreef Scrummie het volgende:
Dit is toch het eiland dat een mega tsunami veroorzaakt als er wat afbreekt ofzo?

quote:

2013-12-28 10:26 UTC
No new data to report but we hope that we will be able to have a clear satellite picture a little later. We are curious to have a look at the ocean water of yesterday’s quakes. These were relatively shallow (there was one from 8 km (the depth of the ocean floor in this area is approx. 3 km)). We remind our readers that the coloring of the see with toxic ingredients started in 2011 before the shallow eruption earthquakes occurred. When the NASA MODIS pictures are available, we will bring them to you.