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Earthquake swarms on Iceland - Reykjanes Ridge and Tjörnes Fracture Zone

Monday Sep 17, 2012 17:56 PM | DOOR: T

The swam on the Reykjanes Ridge yesterday (Icelandic Met Office)
The swam on the Reykjanes Ridge yesterday (Icelandic Met Office)
Earthquakes in Iceland - the swarm in the Tjörnes Fracture Zone is the cluster of quakes north off the island (Icelandic Met Office)
Earthquakes in Iceland - the swarm in the Tjörnes Fracture Zone is the cluster of quakes north off the island (Icelandic Met Office)
Earthquake swarms have been / are occurring in both the volcanic Reykjanes Ridge SW of the island yesterday morning and today in the Tjörnes Fracture Zone.
The seismic swarm in the Reykjanes Ridge contained several quakes above magnitude 3 up to 3.5, and depths ranged between 23 km and up to 0.3 km. It could be caused by a magmatic intrusion as it is on the active rift zone, but it is difficult to know whether a submarine eruption took place or not.
A second earthquake swarm started yesterday in the Tjörnes Fracture Zone north of the Island, and is probably purely tectonic in nature. So far, the largest earthquakes in this swarm have magnitude of 3.1 at 11:07 ad magnitude 3.4 at 14:13 UTC today.
Koppelingen / Bronnen:
Vorig nieuws
Monday, Sep 17, 2012
Volcanoes seem to be more active on weekends or towards the end of weeks, and lazier on Mondays... There has not been much activity really worth to report we could find. ... [meer...]
Sunday, Sep 16, 2012
A slight increase of activity can be noted at Popocatépetl volcano in Mexico. The frequency of explosions has increased to more than 1 per hour, i.e. doubled when compared to last week. ... [meer...]
Saturday, Sep 15, 2012
A new eruption started today at Lokon volcano in North Sulawesi (Indonesia), generating an 1500 m tall ash plume and violent strombolian activity, as well as probably a lava flow. ... [meer...]

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