Challis, Idaho
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Challis is the largest city in Custer County, Idaho, United States. It is the county seat and its population was 1,081 at the 2010 census. The 2020 census showed 902 residents, a 16.6% drop. And as of
Main Street in Challis, May 2007
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.
Challis, Idaho
…Salmon River Scenic Byway uses both highways, from Stanley to Salmon. The junction with Highway 75 is south of Challis. On Friday, October 28, 1983, the Borah Peak earthquake occurred at 8:06 am MDT. The shock measured 6.9 on the moment magnitude scale and had a maximum Mercalli intensity of IX (Violent). The Challis-Mackay…
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