Debris flow off the Illgraben; 3-mile long river in Swiss Alps. This happens 3-5 times a year! They occur so often the @WSL_research center was created to study the mudflows!https://t.co/j9WQMARBDy#EarthScience #geology #physics #weather #physics pic.twitter.com/jY6I2cPEPm
— NESTA-US🌎 (@NESTA_US) March 25, 2020
via Twitter https://twitter.com/NESTA_US
March 25, 2020 at 10:13PM
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