Officials said the ash did not pose a threat to the health of local residents, but aircraft over the heavily traveled North Pacific air corridor were alerted to steer clear of ash plumes that at times stretched far from the volcano’s crater.
There were also concerns expressed for the health and safety of wildlife near Kizimen's crater.
"There is likely to increase mortality of animals in the area as a result of destruction of the respiratory system," said Vladimir Mosolov, Deputy Director for Science for the Kronotsky reserve.
Kizimen’s last major eruption occurred in the late 1920s, according to the RIA Novosti news agency.
The mountain started to rumble to life again last June, with fresh eruptive activity commencing about a month ago.
Photo: Ministry of Natural Resources (Russian Federation)