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El Hierro / Canary Islands - Most Recent Information By The Most Diligent - And Recap Of Past Year
Ms Sans Serif
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[quote:shenue:MV8xOTkxNzI2XzMzNTI1NjY3XzVFNkZEREE2] Good morning. AmerTrap.....stop staying up all night.....get some rest, man. lol [color=red]2012-09-21 07:24[/color] Yesterday was still good for 19 earthquakes, thats 4 more than our latest update yesterday. Depths were 17, 10, 21 and 10 km. All of the quakes had weak Magnitudes. - During the latest swarm, IGN only listed earthquakes M1.5 or higher. Now that events are calming down, they have returned to a full report including the weak ones. - 7 earthquakes listed so far today. Seismicity is back in the El Golfo area. The source for these (magmatic) earthquakes must be a fissure feeder in the crust getting resistance at a 9 to 11 km depth. The crack is currently not big enough to create more pressure as most of the earthquakes remain limited in strength. - [b]GPS Deformations (Dr. Sagiya)[/b] : Restinga : After a strong vertical decrease in the Ultra Rapid data yesterday, the Rapid data (improved data) made the decrease even bigger (1.5 cm to 2 cm). Today, we are up again with a few mm in the Ultra Rapid data (Rapid data are provided many hours later). No horizontal change. We do not detect any direct relation with seismicity as the Las Calmas area had no serious seismicity during the last 24 hours. Pinar : Deflation of approx. 1 cm. Probable reason : the central island activity started to subside yesterday and has almost completely disappeared today. Frontera : After a strong verticcal decrease yesterday (2 cm), Frontera station was 1 cm uplifted today. This is evident, as seismicity has returned in the El Golfo area (9 to 11 km depth). Current deformations are bad news for the people living in the El Golfo area as the process still continues below their area. There is however no direct danger as this pattern is known from the pre-swarm weeks. Fluctuations of 1 cm up and down are fairly normal during the preceding months. In other words hard to tell whether changes are just normal fluctuations or deformations based on the current seismicity patterns. http://earthquake-report.com/2011/09/25/el-hierro-canary-islands-spain-volcanic-risk-alert-increased-to-yellow/ [/quote]
I am the former user "Idgits". About 100 consistent followers and contributors and I created the most informative thread on El Hierro and the Canary Islands archipelago that GLP has ever seen.
Thread: Best El Hierro Thread On GLP - Canary Islands - ACTIVITY HAS RETURNED - AGAIN!
I have since deleted the account that I was using to start that thread, thus the reason it says "AC" now as the original poster.
During the course of that thread I removed all of the "Hi's" and "How are you's" and "bump's" until about page 500...which condensed the thread down to around 280 pages. It has since continued to grow and has become a true source of facts surrounding the earthquake swarm and eventual eruption that took place last year, ending early this year.
Since that eruption officially ended, Hierro has shot back into action several times. I believe we are on the 4th major swarm of activity that has occurred since the eruptive phase ended. It has been recommended by one of our most consistent and well informed users "Shenue" as well as others, to start a new thread to showcase the newest events occuring in Hierro. The previous eruption was incredible, teaching science a whole new concept and understanding of underwater eruptions. It also produced the most radioactive lava ever recorded.
The most incredible feat of Hierro though, is how much pressure it is capable of maintaining WITHOUT erupting. In the last swarm we saw such an incredible increase in pressure that any other geologic formation would've theoretically blown sky high. But not Hierro...it's always maintained it's strength. The current combined energy under Hierro from both magma flow and seismic energy released is basically unknown as IGN stopped recording all the joules together...they stopped the eruptive phase recording in May of this year...here is that chart [
link to www.01.ign.es
So...this new thread is to pick up where Hierro has brought us now. I need to be able to change the thread title as events occur and be able to alert people with that title in case something serious occurs. In addition, there is SO MUCH information in that past thread that it's difficult for new users and followers to sift through to the most recent activities. Below I have comprised a list of information and links relative to the old thread. It's information that took us a year plus to gather!
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