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Yellowstone Today: USGS sends out devastating alert,After investigating Yellowstone volcano eruption Steamboat Geyser is the world's tallest active geyser, with its huge eruptions shooting water more than 300 feet into the air. It is one of over 500 geysers in Yellowstone. Geysers have the potential to occur wherever there is heat, water, and a natural plumbing system formed by gaps in underground rock. When water from rain and snow works its way underground, it eventually comes into contact with molten rock beneath the surface. This causes the water to heat up and travel back up towards the surface again. The superheated water eventually bursts out of the ground, where the relative lack of pressure causes it to flash into steam as a geyser. Yellowstone has so many geysers because it sits on top of a supervolcano, providing the heat that powers the national park's geothermal activity. Steamboat eruptions are unpredictable. The geyser was dormant for half a century until the early 60s, a
