KVERT reported that seismic activity at Shiveluch was above background levels during 21-28 December. Gas-and-steam plumes rose to an altitude of 3.5 km (11,500 ft) a.s.l. during 23-24 December. Based on observations of satellite imagery, a thermal anomaly was present in the crater every day. The Level of Concern Color Code remained at Orange.
Based on observations of satellite imagery and information from the KEMSD, the Tokyo VAAC reported that eruption plumes rose to altitudes of 4.9-5.8 km (16,000-19,000 ft) a.s.l. during 28-29 December.
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.”