Yellowstone’s Steamboat Geyser, the largest in the world, has now erupted eight times in less than three months, in a geological puzzle that has fascinated scientists working at the site.  The most recent Steamboat eruption occurred Monday just after 9 a.m. “It was unbelievable,” Jamie Farrell, a geologist at the University of Utah who happened to be at the geyser during the eruption, told Newsweek. He’s

seen plenty of other geysers go off—but not Steamboat, which is capable of the largest eruptions of all currently active geysers. “The first thing that comes to my mind when I think back on it was just how loud it was, the roar of the eruption,” he said, comparing the second part of the eruption to the sound of a jet engine. That came after a dramatic half hour of the geyser gushing water—and the occasional baseball-sized rock—about 200 feet into the air. READ MORE