M1.9 earthquake 21km NNW of Tehachapi, CA

A magnitude 1.9 earthquake struck 21km NNW of Tehachapi, CA on Tue, Jul 28, 1987, 4:10 PM PDT (23:10 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.3 10km NE of Kernville, 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: 136 in the 60 days after this one and 14 in the 30 days before it.

The first 60 of 136.

From the USGS Earthquake Hazards Program and its partner networks, event ci727023. Read Tue, Sep 22, 2026, 9:29 PM UTC.