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I believe this is something that does not happen often
'Big bang' and 'pillar of fire' as latest of two new craters forms this week in the Arctic
These pockets of methane gas were probably covered by ice but were uncovered when whatever above it was removed.
Scientists have located two fresh craters formed on Yamal peninsula this year, with the latest exploding on 28 June with the eruption picked up by new seismic sensors specifically designed to monitor such events, The Siberian Times can disclose.
First pictures of the large craters - or funnels as experts call them - are shown here, and add to four other big holes found in recent years and examined by experts, plus dozens of tiny ones spotted by satellite.
The formation of both craters involved an explosion followed by fire, evidently signs of the eruption of methane gas pockets under the Yamal surface.
People in Seyakha village heard a 'loud explosion-like bang' then saw a fire and clouds of black smoke, according to reports.
'Big bang' and 'pillar of fire' as latest of two new craters forms this week in the Arctic
These pockets of methane gas were probably covered by ice but were uncovered when whatever above it was removed.