Historic Earthquakes

Hebgen Lake, Montana
1959 08 18 06:37:15 UTC (local 08/17)
Magnitude 7.3
Intensity X

Largest Earthquake in Montana

Damage Photos

Damage Photos: 1   2   3

Photo of earthquake
This pump formerly sat on its concrete base. At the time of the earthquake, water and sand were forced up the casing and played against the base of the pump gradually raising it some 8 inched above its former position. The sand shows as light tan; the concrete base is light gray. Gallatin County, Montana. August 1959.

Photo of earthquake
The Hebgen fault scarp where it crosses the crest of Bost Mountain neart Hebgen Dam. Man stands on down-thrown block of ground. Gallatin County, Montana. August 1959.

Photo of earthquake
Hebgen Lake area. Remnant of road which slid into lake at left; new road at right. Gallatin County, Montana. July 6, 1984.

Photo of earthquake
View of one wall of the spillway. This view, taken in 1960 when a new spillway was being constructed across Hebgen Dam, shows many of the fractures and breaks formed in the old spillway during the earthquake. Gallatin County, Montana. 1960.

Photo of earthquake
"Quake Lake", formed by earthquake landslide. Madison County, Montana. August 1959.

Photo of earthquake
Red Canyon fault scarp east of Blarney Stone Ranch Montana earthquake area. Gallatin County, Montana. August 1959.

Photo of earthquake
Distant view of Red Mountain scarp. Gallatin County, Montana. September 1959.

Photo of earthquake
Detritus, tilted trees, and the hummocky ground marks the center of the Kirkwood earth flow. View is southwestward. Gallatin County, Montana. 1959.

Damage Photos: 1   2   3

 

Photos from the Earth Science Photographs from the U.S. Geological Survey Library, by Joseph K. McGregor and Carl Abston, U.S. Geological Survey Digital Data Series DDS-21, 1995.