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Massive Landslide Pinpointed by Seismometers

Colin Stark/Lamont-Doherty Earth Observatory

Massive Landslide Pinpointed by Seismometers

The largest landslide of rock and ice since 2010 has been located through a network of seismometers. On 16 February, a sheer face of Mount La Perouse in remote southeastern Alaska collapsed, as first reported on The Landslide Blog of the American Geophysical Union. The landslide was detected and measured by a technique developed by Göran Ekström and Colin Stark of Columbia University, who estimate that about 68 million tons of rock, snow, and ice hurtled 7.4 kilometers from the mountaintop. They created this image by combining a recent satellite image with a digital model of the terrain.

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