Vulkaanuitbarsting bij Canarische Eilanden #5

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Op zondag 31 maart 2013 13:43 schreef bwt het volgende:
Te vroeg gesproken
4.9

twitter:

teideano twitterde op zondag 31-03-2013 om 13:17:29 Huge #earthquake at noon...maybe the biggest since everything started at El Hierro....o bet close to 5.0M.... #volcano #geology reageer retweet

twitter:

teideano twitterde op zondag 31-03-2013 om 13:18:59 4.9M.....wow....was close!! reageer retweet

twitter:

teideano twitterde op zondag 31-03-2013 om 13:35:36 Words are useless....this is it, a 4.9M @eruptionsblog @rschott @nchazarra @pabloj_gonzalez @EMSC @VolcanoReport http://t.co/zbvVFXy6pB reageer retweet

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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.