Tuesday, September 18, 2012

[Geology2] El Hierro volcano (Canary Islands) CURRENT ACTIVITY - new earthquake swarm since 14 Sep calming down


Should El Hierro experience an eruption in the near future there may be another problem related to intense weather.
Tropical storm Nadine after passing over the Azores  is still producing intense rain and is moving toward that area of the Atlantic.
Heavy rain plus mountains and earthquakes produce sudden landslides. Hopefully for our friends who live near El Hierro they will hear in a couple of days or less that the former Hurricane Nadine has become a tropical memory as it dies somewhere in that region. 

NOAA says,
"It is important for users to realize that wind speed probabilities that might seem relatively small at their location might still be quite significant, since they indicate that there is a chance that a damaging or even extreme event could occur that warrants preparations to protect lives and property."

There is also that rain!





http://www.volcanodiscovery.com/el-hierro/submarine-eruption-2011.html


Update Mon 17 Sep 18:32
The seismic swarm continues at reduced pace with "only" 70 quakes so far today and magnitudes rarely exceeding M2. The area of epicenters has stabilized about 2 km NW of El Pinar in the central part of the island and at 20 km depth. Slight inflation of that area has become more evident as well.

Current seismic signal (IGN)

Location of recent quakes (IGN)
Seismic activity becomes weaker
Update Mon 17 Sep 09:21
The seismic activity has dropped considerably over night although earthquakes still continue, at generally lower magnitude and reduced frequency compared to yesterday (197 quakes) and the previous days. 
There is no sign of magma movements at the moment, and the epicenters remain focused in the same area under the old Tanganasoga volcanic system in the center of the island, at about 20 km depth.

Current seismic signal (IGN)

Earhtquakes during the past 2 days (IGN)

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