M2.1 earthquake 9 km NNE of Cascade, Idaho

A magnitude 2.1 earthquake struck 9 km NNE of Cascade, Idaho on Thu, Aug 13, 2015, 3:55 PM MDT (21:55 UTC), 6 km (4 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

A larger quake followed: M2.5 25 km ESE of Cascade, Idaho. 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.

An automatic solution; a seismologist may revise it.

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

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 0 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event mb15586259. Read Fri, Oct 2, 2026, 2:12 AM UTC.