Information and photograph courtesy of the Yosemite Association. The straight line along the cliff indicates the maximum extent of the Tioga glaciation and the approximate boundary between the sliding and ballistic trajectories of the falling rock. The approximately 10 acre area of air blast damage is also outlined. A through D indicate the impact area of each part of the falling rock.
Picture of rockfall showing the detachment zone at the top and the impact area at the bottom. A through D show, in time order, the sequence and falling direction of the largest rock sections. Picture of the cliff between Glacier point and Washburn Point taken the day after the rockfall (photograph courtesy of Gerald Wieczorek). Seismo Blog The Yosemite Rock Fall of July 10, 1996Īt 6:52 pm PDT Wednesday, July 10, 1996, a large block of granite, with an estimated volume of 78,000 cubic yards, detached from the cliff between Washburn Point and Glacier Point, in Yosemite Valley.Ĭontour map of Happy Isles area of Yosemite Valley.
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