M1.8 earthquake 4 km NNW of Joseph, Utah

A magnitude 1.8 earthquake struck 4 km NNW of Joseph, Utah on Wed, Jul 23, 1986, 10:30 PM MDT (04:30 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.0 15 km WNW of Emery, Utah. 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: 15 in the 60 days after this one and 3 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event uu50029575. Read Wed, Sep 30, 2026, 10:59 AM UTC.