M3.6 earthquake 22 km SE of Challis, Idaho

A magnitude 3.6 earthquake struck 22 km SE of Challis, Idaho on Sun, Jan 25, 2015, 9:50 PM MST (04:50 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M3.7 22 km SE of Challis, Idaho. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

3 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 85 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event usc000tj2g (also filed as mb15446178). Read Tue, Sep 22, 2026, 11:16 AM UTC.