M1.8 earthquake 45 km ENE of Warm River, Idaho

A magnitude 1.8 earthquake struck 45 km ENE of Warm River, Idaho on Wed, Aug 15, 2018, 11:17 PM MDT (05:17 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.9 25 km ESE of Mammoth, Wyoming. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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: 37 in the 60 days after this one and 37 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event uu60293012. Read Thu, Oct 1, 2026, 11:33 AM UTC.