SE Alaska: Largest Landslide on Earth since 2010.

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Mount La Perouse ‘‹a 10,728-foot peak in the  Fairweather  Range in  Glacier Bay National Park

From the NASA Earth Observatory blog:

The sediment slid in a southeasterly direction, stretching across 7.4 kilometers (4.6 miles) and mixing with ice and snow in the process. The slide was triggered by the collapse of a near-vertical mountain face at an elevation of 2,800 meters (9,200 feet), according to Columbia University seismologist  Colin Stark.

Stark first became aware that a landslide may have occurred when a  rapid detection tool  that sifts through data collected by  global earthquake monitoring network  picked up a signal indicative of a fairly significant event. The earthquake sensors detect  seismic waves–vibrations that radiate through Earth’s crust because of sudden movements of rock, ice, magma, or debris.

 

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