Report on Korovin (United States) — 2 December-8 December 2020
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 2 December-8 December 2020
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2020. Report on Korovin (United States). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 2 December-8 December 2020. Smithsonian Institution and US Geological Survey.
52.381°N, 174.166°W; summit elev. 1518 m
All times are local (unless otherwise noted)
Seismic activity at Korovin had decreased, and satellite images showed no signs of unrest over the previous several weeks. AVO lowered the Alert Level to Green and the Aviation Color Code to Normal on 3 December.
Geologic Background. Korovin, the most frequently active volcano of the large volcanic complex at the NE tip of Atka Island, contains a 1533-m-high double summit with two craters located along a NW-SE line. The NW summit has a small crater, but the 1-km-wide crater of the SE cone has an unusual, open cylindrical vent of widely variable depth that sometimes contains a crater lake or a high magma column. A fresh-looking cinder cone lies on the flank of partially dissected Konia volcano, located on the SE flank. The volcano is dominantly basaltic in composition, although some late-stage dacitic lava flows are present on both Korovin and Konia.