Iliamna , Alaska : large non-volcanic avalanche on the north flank .

Iliamna , Alaska : large non-volcanic avalanche on the north flank .

Just before midnight on Saturday May 21, AVO detected seismic and pressure sensor signals associated with a large non-volcanic avalanche on the north flank of Iliamna Volcano. Avalanche events are somewhat common at this volcano. The seismic signals from the avalanche were observed on…