An ash column reached 7 kilometres above sea level on Wednesday morning.
Klyuchevskaya Sopka's crater fills with lava amid new volcanic activity.
Emergency chiefs say that increased activity means tour companies and residents must avoid going too close to eruptions.
A new air link between Alaska and the Russian Far East is opening up a new world of adventure tourism to US visitors.
Group of tourists got stuck at 2,300m after helicopter blades froze.
This is a fun way to stay fit and raise a healthy child, say supporters.
Yakutia Airlines boosts flights from Alaska to some of the world's greatest, yet most unexplored holiday destinations.
Hot ash tumbled down the mountain's southeastern slope as Bezymianny showed its power.