Report on Korovin (United States) — 2 March-8 March 2005
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 2 March-8 March 2005
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2005. Report on Korovin (United States). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 2 March-8 March 2005. Smithsonian Institution and US Geological Survey.
52.381°N, 174.166°W; summit elev. 1518 m
All times are local (unless otherwise noted)
AVO did not receive reports of activity at Korovin volcano after the original report of ash-and-steam emissions on 24 February. During 25 February to 4 March, cloud cover prohibited satellite views of the volcano and no unusual seismicity was registered. Korovin is not monitored by a standard AVO seismic network. Therefore, AVO did not assign a Concern Color Code to the volcano during the report period.
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.