Scientists say a 'fountain of gas' poured from jelly-like trembling earth in tundra on Belyy Island in northern Siberia.
Gas bubbles from waters filling crater hole on Yamal peninsula two months after volcanic-style explosion in thawing permafrost.
Across the Russian polar regions, these eye-catching pictures show how thawing soil leads to territories being washed away.
Satellites show giant hole ringed by 20 'baby craters'.
Subsea permafrost thaws faster than previously thought, Russian scientists say.