KVERT reported that seismic activity at Koryaksky was at background levels during 20-27 March. Gas plumes containing a small amount of ash rose to an altitude of 4 km (13,200 ft) a.s.l. and drifted S, SE, W and NW during the reporting period. On 25 and 26 March, gas-and-ash plumes were also seen on satellite imagery and drifted 225 km SE. The Level of Concern Color Code remained Orange.
Based on information from the Yelizovo Airport and KEMSD, and analysis of satellite imagery, the Tokyo VAAC reported that during 26-27 and 29 March ash plumes rose to altitudes of 3-3.7 km (10,000-12,000 ft) a.s.l. and drifted S, SW, and W.
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.”