M2.9 earthquake 8 km NNW of Georgetown, Idaho

A magnitude 2.9 earthquake struck 8 km NNW of Georgetown, Idaho on Fri, Oct 20, 2017, 10:38 AM MDT (16:38 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M4.0 15 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
2.9	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.043 · 70 stations
2.89	ML, local (Richter)	University of Utah Seismograph Stations	Final · ±0.236 · 5 stations

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: 77 in the 60 days after this one and at least 200 in the 30 days before it.

The first 60 of 77.

From the USGS Earthquake Hazards Program and its partner networks, event us1000auql (also filed as uu60254127). Read Thu, Oct 1, 2026, 5:50 AM UTC.