KVERT reported that a thermal anomaly over Sarychev Peak was identified during 7-10 and 12-13 January.
A gas-and-steam plume drifted 40 km NE on 12 January.
The Aviation Color Code was raised to Yellow (the second lowest level on a four-color scale) on 10 January.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)