M4.1 earthquake 11 km NW of Georgetown, Idaho

A magnitude 4.1 earthquake struck 11 km NW of Georgetown, Idaho on Mon, Sep 11, 2017, 3:38 AM MDT (09:38 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.7 9 km NW 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
4.1	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.053 · 46 stations
4.23	ML, local (Richter)	University of Utah Seismograph Stations	Final · ±0.263 · 3 stations

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

No one has reported feeling this quake to the USGS.

The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.

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

The first 60 of at least 199.

From the USGS Earthquake Hazards Program and its partner networks, event us2000bsvf (also filed as uu60013659). Read Thu, Oct 1, 2026, 7:19 AM UTC.