M1.6 earthquake 15km NE of Lancaster, CA

A magnitude 1.6 earthquake struck 15km NE of Lancaster, CA on Thu, Dec 13, 1979, 11:39 AM PST (19:39 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.9 9km NE of Grapevine, 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: 62 in the 60 days after this one and 18 in the 30 days before it.

The first 60 of 62.

From the USGS Earthquake Hazards Program and its partner networks, event ci3354539. Read Tue, Sep 22, 2026, 11:14 AM UTC.