M3.8 earthquake 10 km SE of Challis, Idaho

A magnitude 3.8 earthquake struck 10 km SE of Challis, Idaho on Mon, Jan 18, 2016, 11:29 PM MST (06:29 UTC), 8 km (5 mi) below the surface.

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.

8 people reported to the USGS what they felt; the strongest reported shaking was III, 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: 66 in the 60 days after this one and 18 in the 30 days before it.

The first 60 of 66.

From the USGS Earthquake Hazards Program and its partner networks, event us10004fi9 (also filed as mb80120444). Read Wed, Sep 30, 2026, 2:59 AM UTC.