Klyuchevskaya Sopka's crater fills with lava amid new volcanic activity.
The 7,000 year old volcano is the highest mountain in Russia outside the Caucases.
Emergency chiefs say that increased activity means tour companies and residents must avoid going too close to eruptions.
Soul-stirring images of eruption on the Klyuchevskaya Sopka caught by extreme travellers at altitude of 2,850 metres (9,350 ft).
Visitors ‘risking their lives’ to witness spectacular formation of second cone on Klyuchevskaya Sopka in Kamchatka.
Rescuers finally reached him after 17 days but there was ‘no miracle’.