Yellowstone closes Biscuit Basin for the season after hydrothermal explosion NBC NewsYellowstone eruption blasts debris into sky near Old Faithful geyser BBC.comA baffling, dangerous explosion in Yellowstone: What is a hydrothermal explosion? USA TODAYYellowstone, USGS release more details about Biscuit Basin hydrothermal explosion KBZK NewsYellowstone Park Officials Conclude Cause Of Explosion The Weather Channel