A seismic swarm marks the center of the caldera of Katla in Iceland : about 200 earthquakes were detected in 24 hours and the activity continues. The largest earthquakes were of magnitude 3.1 and 3.7 at 4:40 to 4:41 this september 30, and 3.0 at 16:28 on 29.09 and 3.2 to 2:43 tonight. All these earthquakes are shallow. The IMO also indicates a conductivity of water higher than normal glacial rivers at this time of year.
First comment by Geologist Erik Klemetti:Nice little EQ swarm at Katla today. Reminder: they are relatively common and don’t mean eruption:
New: Aviation alert level raised at Iceland’s Katla after significant earthquake swarm: https://t.co/ZaDPggM59r— Erik Klemetti (@eruptionsblog) September 30, 2016