Mariposa Fire Mountain Community Fire Information
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On March 28, 2009, a large rockfall occurred from Ahwiyah Point near Half Dome. Rocks fell roughly 1,800 feet, knocking down hundreds of trees and burying hundreds of feet of trail on the southern portion of the Mirror Lake Loop Trail. The impact generated ground shaking equivalent to a magnitude 2.4 earthquake. Numerous smaller rockfalls have occurred from Ahwiyah Point since the initial rockfall on March 28. There were no injuries or structures affected. https://www.nps.gov/yose/learn/news/ahwiyahrockfall.htm
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