KVERT reported that seismic activity at Karymsky was above background levels during 11-18 April. Based on seismic interpretation, weak ash-and-gas explosions or hot avalanches may have occurred daily during 10-14. Observations of satellite imagery revealed that a thermal anomaly was present in the crater on 12 and 13 April. Based on information from KEMSD, the Tokyo VAAC reported that an eruption plume rose to an altitude of 3.7 km (12,000 ft) a.s.l. on 22 April. Ash was not detected on satellite imagery. 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.”