A paper published in Science in 2017 described hundreds of massive, kilometer-wide craters on the ocean floor in the Barents Sea. Today, more than 600 gas flares have been identified in and around these craters, releasing the greenhouse gas steadily into the water column. Another study, published the same year in PNAS, mapped several methane mounds, some 500 meters wide, in the Barents Sea. The mounds were considered to be signs of impending methane expulsions that created the craters.
Click here for original story, New study reveals cracks beneath giant, methane gushing craters
Source: Phys.org