The current Opala cone formed along the northern rim of the 13 x 19 km Pleistocene caldera that formed during the largest eruption in Kamchatka in 50,000 years, shown in this September 2018 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 15 km across). The circular feature on the SE flank is the ~1.3 x 2 km Baranii Amphitheater crater, which produced a large eruption in 1400 cal BP and was then filled with an obsidian dome.

Satellite image courtesy of Planet Labs Inc., 2018 (https://www.planet.com/).

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Keywords: caldera | lava dome | stratovolcano | crater

Opala