Author: Christopherson, Edmund,
Title: The Night the Mountain Fell: the story of the Montana-Yellowstone Earthquake.
Description: W. Yellowstone, MT, Yellowstone Pubs, (1962). VG PB. At 11:37pm on Monday, August 17, 1959, one of the severest earthquakes recorded on the N. American continent shook Montana. It sent gigantic tidal waves surging down the 7-mile length of Hebgen Lake, throwing an enormous quantity of water over the top of the Dam, a wall 20 ft high swept down the narrow Madison Canyon full of campers and vacationers.

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