M3.0 earthquake 0km SW of Anza, CA

A magnitude 3.0 earthquake struck 0km SW of Anza, CA on Tue, Jun 15, 1982, 4:56 PM PDT (23:56 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M4.2 2km NNE of Anza, CA. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.01	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · 5 stations
3.0	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

The USGS’s account of the effects of this earthquake.

Felt.

From the USGS event page for ci532523. U.S. Geological Survey text and figures are in the public domain.

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: 200 in the 60 days after this one and 115 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event ci532523 (also filed as usp0001myc). Read Thu, Oct 1, 2026, 1:35 PM UTC.