M3.5 earthquake 27 km NE of Lima, Montana

A magnitude 3.5 earthquake struck 27 km NE of Lima, Montana on Thu, Apr 12, 2018, 6:11 PM MDT (00:11 UTC), 10 km (6 mi) below the surface.

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
3.5	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.048 · 58 stations
3.66	ML, local (Richter)	Montana Bureau of Mines and Geology	Final · ±0.286 · 27 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.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 15 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event us2000dzal (also filed as mb80289509). Read Fri, Oct 2, 2026, 7:52 PM UTC.