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At 08:23 on March 13, 2019, the upper part of a gully along the western wall of the new Halema‘uma‘u crater failed, producing a rockfall. When geologists arrived at the summit at 09:00, rocks were still falling, and a small dusty plume was visible until 09:08. This rockfall was likely triggered by instability of the talus slope caused by water that has been trickling out of a round hole in the cliff face since July 2018, when the steep gully first formed. Photo taken Wednesday, March 13, 2019 courtesy of U.S. Geological Survey

At 08:23 on March 13, 2019, the upper part of a gully along the western wall of the new Halema‘uma‘u crater failed, producing a rockfall. When geologists arrived at the summit at 09:00, rocks were still falling, and a small dusty plume was visible until 09:08. This rockfall was likely triggered by instability of the talus slope caused by water that has been trickling out of a round hole in the cliff face since July 2018, when the steep gully first formed. Photo taken Wednesday, March 13, 2019 courtesy of U.S. Geological Survey

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