Near Mackay in Custer County, Idaho — The American West (Mountains)
Earthquake! - The Results
Ground motion, or “ground roll,” did $15,000,000 damage to roads and buildings in the Challis and Mackay areas.
Boulders tumbled down mountains. Some struck homes around Challis 35 miles north.
New springs - and craters called “sand boils” - erupted in the valley. The largest deluge of water ever recorded after an earthquake in the United States - some 400 billion gallons - gushed forth.
We know that identical earthquakes rocked this area in the past - as recently as a few thousand years ago. It will happen again! Scientist cannot say exactly when, but Borah Peak and Thousand Springs Valley will certainly slide further apart as more earthquakes rumble along this fault system.
For more information, stop at National Forest offices in Mackay and Challis
Erected by Challis National Forest.
Topics. This historical marker is listed in these topic lists: Disasters • Natural Features. A significant historical date for this entry is October 28, 1983.
Location. Touch for map. Marker is in this post office area: Mackay ID 83251, United States of America. Touch for directions.
Other nearby markers. At least 5 other markers are within 13 miles of this marker, measured as the crow flies. Earthquake! - The Event (a few steps from this marker); Earthquake! - The Stage (within shouting distance of this marker); Earthquakes (approx. 2½ miles away); Mount Borah (approx. 2½ miles away); Goodin's River (approx. 12.8 miles away).
Regarding Earthquake! - The Results. This marker is located at a geologic exhibit about 2 1/2 miles on a gravel road from US Highway 93.
Credits. This page was last revised on November 7, 2017. It was originally submitted on November 7, 2017, by Barry Swackhamer of Brentwood, California. This page has been viewed 221 times since then and 39 times this year. Photos: 1, 2, 3. submitted on November 7, 2017, by Barry Swackhamer of Brentwood, California.