Hundreds of craters caused by methane explosions were discovered underneath Barents sea. Further research finds evidence that the violent explosions could happen again in the future.

Locals say they saw flames and smoke as a major bubble of methane blasted below the surface and created another sinkhole in the Russian Arctic peninsula.

Scientists rush to site of latest tundra eruption - which formed a crater 50 metres deep - amid fears for homes and key industrial sites.

Gas pipes supplying Europe run right over swelling Yamal tundra which is deeply unstable to the release of underground methane.

A research team has discovered that bottom sediment temperatures in the Russian Arctic shelf vary across different regions, with the Kara Sea having higher temperatures due to warm currents and large Siberian rivers, and the Laptev Sea and East Siberian Sea having the lowest temperatures and thicker subsea permafrost, which is important for understanding the degradation of permafrost and methane emissions in the region.