What’s happening is Siberian permafrost is defrosting due to climate change. When that happens, it releases methane gas which in some cases is at such a pressure that it causes the land to explode, leaving enormous craters. The Arctic is warming twice as fast as the global average so this can be expected to accelerate should nothing change.
Ultimately, this results in significantly more carbon in the atmosphere which only makes climate change worse. It’s happening in Siberia now but could also extend to Alaska and northern Canada.