Hydrothermal eruption in Yellowstone National Park sends sightseers fleeing The GuardianYellowstone just had an explosion. What that means for the future. MashableA baffling, dangerous explosion in Yellowstone: What is a hydrothermal explosion? USA TODAYBiscuit Basin in Yellowstone National Park temporarily closed due to hydrothermal explosion National Park ServiceWhat caused the hydrothermal explosion at Yellowstone National Park? Meteorologist explains CBS News