M1.7 earthquake 23 km WNW of Challis, Idaho

A magnitude 1.7 earthquake struck 23 km WNW of Challis, Idaho on Fri, Jan 22, 2016, 11:32 PM MST (06:32 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.6 15 km NE 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: 60 in the 60 days after this one and 19 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event mb80121159. Read Thu, Oct 1, 2026, 11:24 PM UTC.