KVERT reported that seismic activity at Karymsky was slightly above background levels on 15, 16, and 21 May and at background levels the other days during 16-23 May. Gas-and-ash explosions that produced plumes to an altitude of 3.4 km (11,200 ft) a.s.l. may have occurred during 15-16 and 21-22 May. Observations of satellite imagery revealed that on 16 and 20 May a thermal anomaly was present in the crater. The Level of Concern Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT) – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”