M3.4 earthquake 9 km NNW of Challis, Idaho

A magnitude 3.4 earthquake struck 9 km NNW of Challis, Idaho on Fri, Apr 12, 2019, 4:43 AM MDT (10:43 UTC), 5 km (3 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
3.4	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.035 · 106 stations
3.74	ML, local (Richter)	Montana Bureau of Mines and Geology	Final · ±0.275 · 32 stations

10 people reported to the USGS what they felt; the strongest reported shaking was III, 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: 43 in the 60 days after this one and 1 in the 30 days before it.

1.642 km WSW of Salmon, IdahoThu, Apr 11, 8:59 AM MDT · 2734 days ago · 5 km deep · 54 km away

From the USGS Earthquake Hazards Program and its partner networks, event us700034x2 (also filed as mb80340219). Read Mon, Oct 5, 2026, 8:10 AM UTC.