M1.8 earthquake 14 km SE of Challis, Idaho

A magnitude 1.8 earthquake struck 14 km SE of Challis, Idaho on Sun, Oct 11, 2015, 4:14 PM MDT (22:14 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M2.1 13 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.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 61 in the 60 days after this one and 16 in the 30 days before it.

The first 60 of 61.

From the USGS Earthquake Hazards Program and its partner networks, event mb80101644. Read Tue, Sep 22, 2026, 10:27 PM UTC.