#356 - Earthquakes
Posted by: 
Volcanoguy
N 44° 08.408 W 113° 54.285
12T E 267659 N 4891540
Idaho History Sign #356 about the Borah Peak Earthquake.
Waymark Code: WMC56H
Location: Idaho, United States
Date Posted: 07/26/2011
Views: 5
One of two Idaho History Signs located just west of the junction of Double Springs Pass Road with U.S. Hwy. 93. The subject of the sign is the Borah Peak Earthquake which occurred on October 28, 1983.
Marker Name: Earthquakes
Marker Type: Roadside
Marker Text:
On October 28, 1983, a major earthquake fracture, 26 miles long and 7 miles deep, surfaced as Lost River Valley slid away from Mount Borah.
During that rock shift, Mount Borah’s ridge front rose about 6 inches, while this valley subsided 9 feet. This kind of movement has been going on here for 10 to 20 million years as subsurface rock has been pulled apart during gradual but persistent range and valley building. You can drive to a spectacular fracture that shattered this side road 2 1/2 miles from here.
County: Idaho
Group Responsible for Placement: State of Idaho
Marker Number: 356
City: Not listed
Date Dedicated: Not listed
Web link(s) for additional information: Not listed
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Visit Instructions:
In your log, please say if you learned something new, and if you took any extra time to explore the area once you stopped at the historic marker waymark.
If possible please post a photo of you OR your GPS at the marker location.
Also if you know of any additional links not already mentioned about this bit of Idaho history please include that in your log.