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Iliamna volcano (Alaska): seismic unrest, but alert level remains at green

Friday Mar 09, 2012 08:18 AM | BY: T
Seismic activity recorded at Iliamna volcano on 9 Mar 2012 (AVO)
Seismic activity recorded at Iliamna volcano on 9 Mar 2012 (AVO)
Since the middle of January 2012, seismic activity at Iliamna volcano has increased with more than usual numbers of earthquakes greater than magnitude 2.
It is common to have earthquake swarms in the vicinity of Iliamna, which are usually caused by magmatic intrusion at depth. The ongoing activity is being closely monitored by AVO seismologists. AVO for now has not raised the alert status, which officially remains at "green".
Similar swarms have last occurred in 1996-97, and there was no eruption then.
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