Kizimen (Russian: Кизимен) is a stratovolcano located in the southern part of Kamchatka Peninsula, Russia.
The volcano was in a dormant state since an eruption in 1929, but on 2 September 2009 it was reported by Georgina Cooper for the Reuters news agency that the crater lake temperature had risen 10 degrees Celsius in a week and plumes of steam were rising from its flanks. The activity continued throughout 2010, with the formation of new fumaroles reported in November. Seismic activity and ash emission continued to build over the following weeks, and in January 2011 a hotspot was recorded, indicating the presence of lava. In early February 2011 the volcano sent a column of ash several kilometres high.
In April 2011, it was reported that the volcanic activity and ash were threatening the endangered wild reindeer of the area.
On 31 December 2012, following a 24-hour period of some 357 earthquakes reported under the volcano, Kizimen was raised to 'orange alert' status. An eruption was reported on 10 January 2013, with the ash plume reaching 4,200 m (13,800 ft) altitude.