KVERT reported that Strombolian activity at Klyuchevskoy was visible during 15-22 May along with a bright thermal anomaly identified in satellite images.
A lava flow continued to advance down the Apakhonchich drainage on the SE flank.
Gas-and-steam plumes with some ash drifted 100 km NW, E, and SE during 15-17 and 21 May.
The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)