‘Small hydrothermal explosion’ reported at Biscuit Basin in Yellowstone National Park KBZK NewsHydrothermal explosion at Biscuit Basin in Yellowstone National Park damages boardwalk USA TODAYVIDEO: Biscuit Basin geyser explodes, sending Yellowstone tourists packing Jackson Hole News&GuideSurprise blast of rock, water and steam sends dozens running for safety in Yellowstone ABC NewsHydrothermal explosion leads to closure of parts of Yellowstone National Park CNN