M3.4 earthquake 13 km NNW of Georgetown, Idaho

A magnitude 3.4 earthquake struck 13 km NNW of Georgetown, Idaho on Sun, Sep 3, 2017, 6:36 PM MDT (00:36 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M5.0 9 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.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.4	Mwr, regional moment	USGS National Earthquake Information Center	Preferred · Reviewed · 13 stations
3.29	ML, local (Richter)	University of Utah Seismograph Stations	Final · ±0.147 · 15 stations

3 people reported to the USGS what they felt; the strongest reported shaking was II, 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 202 in the 60 days after this one and 174 in the 30 days before it.

The first 60 of at least 202.

From the USGS Earthquake Hazards Program and its partner networks, event us2000afc3 (also filed as uu60231682). Read Fri, Oct 2, 2026, 11:14 AM UTC.