Last Week A 60 Million-Ton Avalanche Was Triggered in Canada

Last Week A 60 Million-Ton Avalanche Was Triggered in Canada

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Last Week A 60 Million-Ton Avalanche Was Triggered in Canada

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Image by NASA Earth Observatory images by Jesse Allen, using Landsat data from the U.S. Geological Survey.

Satellite Images have revealed a massive 45 to 50 megaton avalanche in Canada that occurred early last week. The slide ripped down the southeast flank of Mount Steele in Canada’s Yukon Territory. The avalanche was so large that it was initially detected by earthquake seismometers.

The mega avalanche was triggered last Monday,  October 12. It’s crown was reported to be at an elevation of about 3350 m. It ran a total vertical distance of about 2200 m to the toe. The seismic data suggests that this rock avalanche had a peak velocity of about 130mph. The data also suggests that the slide lasted about 110 seconds.

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The 2007 Mount Steele rock avalanche from Lipovsky et al. (2008)

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Source: NASA Earth Observatory; AGU Landslide Blog

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