Aktuan's summit caldera, with intracaldera cone just barely visible. Some AVO seismic stations are placed high on the flanks, within 3 km (1.8 mi) of the active cone.
Credit: Image courtesy of the AVO/UAF-GI.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / University of Alaska Fairbanks, Geophysical Institute when using this image. Full Resolution.