El Hierro volcano (Canary Islands) news & activity updates
El Hierro volcano (Canary Islands): possible second submarine eruption occurred 2012
Friday Feb 08, 2013 07:06 AM | BY: T
The detected submarine volcanic plume as evidence for an eruption (INVOLCAN)
Some new data suggest that a second submarine eruption occurred at El Hierro last year. Spanish scientist have published what they claim evidence that a second submarine eruption actually occurred at the sea floor SW off El Hierro Island during the strong seismic crises in end of June - July 2012.
Depth vs time of quakes at El Hierro during the June-July 2012 seismic crisis
Evidence of this claimed eruption was detected by the oceanographic vessel Hesperides using sonar images which, according to the researchers showed volcanic material erupted in an area less than 2 NM from the coast and at depths of 64 to 88 meters. The material formed a plume that rose up to a depth of 48 meters.
Involcan claims that the strong deformation and increased gas emissions at that time confirm this hypothesis. However, as earthquake-report mentioned, no earthquakes at shallow depths occurred. But exactly this would have to be expected if new eruptive vents opened there. All in all, it is fair to keep some doubts about the presented conclusion.
Links / Sources:
Links / Sources:
Saturday, Jan 26, 2013
Small earthquakes have started to occur again in increased numbers. Following a period of calm with many days without any quakes, about 9 small quakes in the range of magnitude 1-2 have been recorded over the past 48 hours. [more]
Wednesday, Jan 02, 2013
Just before the end of last near, a new earthquake swarm started on 31 Dec. Most quakes are located at 15-20 km depth under the El Golfo bay and seem to propagate slowly towards the east. [more]
Monday, Oct 15, 2012
A new small swarm of small quakes (10 so far) has started this morning under the center of the island. The earthquakes are located at about 10 km depth. [more]
Sunday, Oct 07, 2012
A new earthquake swarm has started yesterday, when the number of quakes rose from an average of about 8-10 to 23 quakes. Most of them are weak and located at around 10 km depth in the western El Golfo area. [more]
Tuesday, Oct 02, 2012
Yesterday, the number of recorded quakes rose to about 15 and suggests a new seismic swarm could be beginning. The quakes are concentrated again in 2 areas: in the center of the island at depths of 10-15 km and in the western El Golfo area at depths of about 10 km. [more]