My initial desire to clamber down & walk out to shoot fotos vanished when I contemplated the dire outcome of having the ground collapse beneath my feet. This perfectly circular cylinder of a hole reminded me of those giant methane gas craters in the Siberia tundra. Except there isn’t any crater rim piled with ejected debris. Do you see any evidence of an explosion? There wouldn’t be any methane gas pockets down under the ice & rock anyway, yes? So what the Hell is this hole in the ground?