The collapse of the Pu‘u ‘Ō‘ō crater floor yesterday (April 30) produced a large amount of red ash that was deposited around Pu‘u ‘Ō‘ō, as well as blown farther downwind, with a thin dusting of ash reaching uprift as far as Mauna Ulu. This photo, taken between 1-2 km (0.6-1.2 miles) from the 61g vent, shows a layer of red ash on top of active 61g lava flow surface breakouts. Photo taken Tuesday, May 1, 2018 courtesy of U.S. Geological Survey