KVERT reported that seismic activity at Karymsky was at background levels during 21-28 February. Based on interpretations of seismic data, ash plumes likely rose to an altitude of 3.7 km (12,100 ft) a.s.l. On 24 February, pilots reported a dark plume near the volcano that rose to altitudes of 2.1 km (6,900 ft) a.s.l. Analysis of satellite imagery revealed a thermal anomaly on the lava dome during 21 and 24-25 February, and an ash plume that drifted 150 km NE on 21 February. The Level of Concern Color Code remained at Orange.
Based on information from KEMSD and analysis of satellite imagery, the Tokyo VAAC reported that eruptions on 28 and 29 February produced plumes that rose to altitudes of 3-3.4 km (10,000-11,000 ft) a.s.l. and drifted W. On 3 March, an ash plume reported by the Yelizovo Airport (UHPP) rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted E.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC) - “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”