M2.3 earthquake 22km NNE of Trona, CA

A magnitude 2.3 earthquake struck 22km NNE of Trona, CA on Sat, Sep 28, 2002, 5:24 AM PDT (12:24 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M4.0 21km NNE of Trona, CA. 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: 97 in the 60 days after this one and 37 in the 30 days before it.

The first 60 of 97.

From the USGS Earthquake Hazards Program and its partner networks, event ci9828949. Read Mon, Oct 5, 2026, 12:04 PM UTC.