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Sunday, December 18, 2011

El Hierro Volcano : Yellow-Red alert

The eruption has subsided but is not over yet. 

(see images)

Last update: December 18, 2011 at 6:54 pm by By 

Update 18/12 – 18:48 UTC

Joke Volta told us this morning that she saw the Guardia Civil / Involcan helicopter. We expected new images and video of the remaining activity tonight. Here they are. All images are courtesy and copyright Guardia Civil Helicopteres / Involcan.
Update 18/12 – 18:04 UTC

Beautiful series of images made by Joke Volta during the morning hours ?
 Joke climbed almost to the top of the mountain carrying some antennas and the IGN cameras. The IGN cameras have been installed at a height of 198 meter to have the best possible view on the stain and the vent. The Cabildo and RTVC webcams are estimated to be installed at a height of 100 meter.
Click on the images to see the series in full size
Update 18/12 – 12:44 UTC

- It looks more and more today that the main vent is no longer active anymore. The new stains are feeding speculation that some new vents may have opened to the east of the former one and at approx. the same distance from La Restinga
Update 18/12 – 10:13 UTC

- Joke has been climbing a mountain behind La Restinga this morning to shoot some pictures.  She had to come done again because of the rough wind and has some bruises from gliding on the steepest parts. She reported that the head of the stain was very visible higher up (contrary to what we could expect after the subsiding tremor). Within a few hours you may expect her pictures.

- Joke told us a little earlier that she saw the Guardia Civil / Involcan helicopter flying over the Las Calmas sea.  This will bring probably tonight new videos and images. The reason why the helicopter wasn’t flying for many days last week was because a shortage of personnel (to be trusted source).
Morning stain as seen from above La Restinga
Update 18/12 – 10:10 UTC
- The RTVC webcam shows 2 well defined stains in another area than the normal vent. We expect that the stain may be a left over from earlier stains traveling around with the current.
Update 18/12 – 09:20 UTC
Bad news for the volcano fans-followers among our readers. The eruption is subsiding further and looses more and more strength.
- We do not know whether there is a direct connection with what happened yesterday afternoon as it can not be linked with the harmonic tremor graph, but we think that there is certainly an indirect relation. Yesterday afternoon 2 weak earthquakes occurred at very shallow depth in the coastal El Golfo area. The first one  occurred at 15:24 had a magnitude of 1.0 and occurred at a depth of 3.4 km. The second one occurred 1 minute later, had a magnitude of 1.4 and occurred at a depth of 3.0 km.
- Reader Heather also posted in her comment this morning that :  after the 15:24 quake, people ran to their homes as there was a very strong smell of gas and they had difficulty breathing (ER: unconfirmed so far).Update 12:26 UTC : Joke just called the El Golfo human webcam. She lives in Los Llanillos  and said that the quakes were not felt (ER: normal at this weak magnitude) and that she did not smell any special odor.
2 shallow earthquakes on December 17 2011 may have been the end of the eruption at El Hierro

Source, older reports, pictures: The Earthquake Report

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