geothermal changes happen and not always indicate an impending ‘event’ of some kind.
case in point one of my fav areas of the park is the ‘mud volcano’ area in Hayden valley. A very active area. In the late 1970s a place called ‘frying pan basin’ was mellow, bubbles up through the hot springs area beneath the wooden walk way sounded like bacon sizzling in a frying pan. Early 1980s that changed dramatically as a fumaroles developed on an adjacent hill side (killing a stand of trees) and small mud volcanos developed beneath the wooden walk way. By the end of the e 80’s the trail was rerouted around the new little mud volcanos. By the early 1990’s activity ceased and the basin reverted once again to its more mellow ‘frying pan’ basin.
Good points!