Earthquake Hazards
Geological and seismological studies show that earthquakes are likely to happen in any of several active zones in Idaho and adjacent states. Idaho has experienced two large earthquakes in historical times- the 1959 Hebgen Lake earthquake (M7.3) and the 1983 Borah Peak earthquake (M6.9). 
Borah Peak
Did you feel an earthquake? Report it here and view regional maps of shaking intensity.
How to lessen earthquake risk to you and your home
Download this free poster

Idaho Earthquake Maps and Images:

Idaho Miocene –Quaternary Fault Map
Use the popular Google Earth viewer to locate and view faults.

Idaho Epicenters:1872-2007 Google Earth Version

Major Historical Earthquakes of Idaho

Photos of the fault scarps and damage caused by the 6.9 magnitude Borah Peak earthquake in 1983 near Challis in east-central Idaho.