While working on a job a while back, I suddenly was aware of the sound of running water. Almost like the sound of a fountain. Interior Alaska had a lot of snow over the winter, so there was standing water everywhere, but moving water had me curious, so I went off towards the sound.
I came to a water hole that only fills up after break up. By the end of June it would probably be dried up. But now, it was full, and in the middle of the large puddle, was a water fountain. Initially, the stream of water went up 3-4 feet above the surface of the puddle. By the time I decided to hike back to my truck to get my phone, it had dropped down to 5-6 inches. From the time I heard the water, to the time the puddle stopped percolating, was a good 90 minutes.
A pocket of methane below the service had suddenly found a way up to sunlight, and the release put on a good show. These pockets are being released all across the Arctic, and I live in a hot bed of that activity.