KVERT reported that seismic activity at Karymsky was slightly above background levels during 23 and 25-26 March, and at background levels during 21-22, 24, and 27-28 March. Based on seismic interpretation, ash plumes possibly rose to an altitude of 3.3 km (10,800 ft) a.s.l. on 22 March. Weak ash explosions or avalanches possibly occurred during 23-26 March. Based on observations of satellite imagery and information from KVERT, the Tokyo VAAC reported that eruption plumes rose to altitudes of 3-7 km (10,000-23,000 ft) a.s.l. during 28-29 March. The Level of Concern Color Code remained at Orange.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC) – “Report provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”