Tjörnes Fracture Zone (north of Iceland) experiences strong earthquake swarm with magnitude 5.2 quake
Sunday Oct 21, 2012 14:05 PM | BY: T
During the first 12 hours, about 300 quakes greater than magnitude 1 occurred at various depths ranging between 1 and 13 km, including 47 greater than magnitude 3. The largest was a widely felt M5.2 event in 10,8 km depth. Most quakes are located between the north coast of Iceland and the small island of Grimsey. A submarine volcano is known from a location north of Grimsey that erupted in 1372.
A weaker swarm yesterday around noon preceded the current one. Earthquakes, mostly of tectonic origin, are frequent in the TFZ, but since it is also near the volcanic rift zone, a magmatic component cannot be ruled out. At present, the nature of the quakes (purely seismic or magma intrusion) is not known.
Friday, Oct 05, 2012
A new small swarm of earthquakes started east of Grímsey Island in the Tjörnes Fracture Zone (TFZ) north of Iceland yesterday 4 Oct. So far, there have been 41 quakes during the past 48 hours, mostly of small magnitudes (1-2) at various depths mostly around 10 km. The largest quakes was a magnitude 3.1 event at 11:35 UTC. ... [more]
Monday, Oct 01, 2012
A small earthquake swarm took place at the Tjornes Fracture Zone in the past 48 Hours. Only 1 tremor was larger than magnitude 3. ... [more]
Friday, Sep 21, 2012
The seismic swarm at the Tjörnes Fracture Zone has been calming down. ... [more]