M2.5 earthquake 9 km NNW of Georgetown, Idaho

A magnitude 2.5 earthquake struck 9 km NNW of Georgetown, Idaho on Wed, Oct 11, 2017, 10:55 AM MDT (16:55 UTC), 6 km (4 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
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.045 · 66 stations
2.57	ML, local (Richter)	University of Utah Seismograph Stations	Final · ±0.152 · 10 stations

3 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 145 in the 60 days after this one and at least 199 in the 30 days before it.

The first 60 of 145.

From the USGS Earthquake Hazards Program and its partner networks, event us1000aq8x (also filed as uu60252382). Read Thu, Oct 1, 2026, 4:28 PM UTC.