M3.9 earthquake 10 km NNW of Georgetown, Idaho

A magnitude 3.9 earthquake struck 10 km NNW of Georgetown, Idaho on Fri, Sep 15, 2017, 11:20 PM MDT (05:20 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M4.1 8 km NNW of Georgetown, 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.

22 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and at least 200 in the 30 days before it.

The first 60 of at least 201.

From the USGS Earthquake Hazards Program and its partner networks, event us2000anyv (also filed as uu60246297). Read Sat, Sep 26, 2026, 8:16 AM UTC.