M2.3 earthquake 8 km SE of Challis, Idaho

A magnitude 2.3 earthquake struck 8 km SE of Challis, Idaho on Sat, Jan 31, 2015, 4:29 AM MST (11:29 UTC), 13 km (8 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

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.

No one has reported feeling this quake to the USGS.

An automatic solution; a seismologist may revise it.

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

Within 100 km, magnitude 1.5 and up: 21 in the 60 days after this one and 83 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event mb15015932. Read Thu, Oct 1, 2026, 8:43 PM UTC.