Yellowstone geyser explosion sends visitors running ABC NewsBiscuit Basin in Yellowstone National Park temporarily closed due to hydrothermal explosion National Park ServiceVideo: Hydrothermal eruption sends tourists running in Yellowstone The Washington PostVIDEO: Biscuit Basin geyser explodes, sending Yellowstone tourists packing Jackson Hole News&GuideHydrothermal explosion at Biscuit Basin in Yellowstone National Park damages boardwalk USA TODAY