1959 Hebgen Lake earthquake
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The 1959 Hebgen Lake earthquake occurred in the western United States on August 17 at 11:37 pm in southwestern Montana.
Highway 287 slumped into Hebgen Lake, 1959 image
House destruction from the earthquake, July 2009
Road damage from the earthquake, 1959 image
1983 Borah Peak earthquake
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The 1983 Borah Peak earthquake occurred on October 28, at 8:06:09 a.m. MDT in the western United States, in the Lost River Range at Borah Peak in central Idaho.
1959 Hebgen Lake earthquake
…Madrid earthquakes in Missouri. The 1959 earthquake is also the most severe earthquake in the Rocky Mountains area of the United States along with the 6.9 magnitude earthquake which struck Idaho in 1983. The landslide caused by this quake was the largest since an earthquake in Wyoming in 1925 caused a landslide amounting to…
Borah Peak with fault scarp seen near base of tan hill in foreground
A segment of the Borah Peak earthquake fault scarp near Willow Creek
Fault scarps that outline the graben produced near Willow Creek
Crater caused by an artesian fountain