M3.3 earthquake 11 km NNW of Coalinga, California

A magnitude 3.3 earthquake struck 11 km NNW of Coalinga, California on Sat, Jul 9, 1983, 12:59 AM PDT (07:59 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M5.4 11 km NNW of Coalinga, California. 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
3.3	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed
3.42	ML, local (Richter)	Southern California Seismic Network	Final · ±0.19 · 11 stations

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

Felt in the Coalinga area.

From the USGS event page for usp0001wp4. U.S. Geological Survey text and figures are in the public domain.

No one has reported feeling this quake to the USGS.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 196 in the 30 days before it.

The first 60 of at least 201.

From the USGS Earthquake Hazards Program and its partner networks, event usp0001wp4 (also filed as ci12328139). Read Fri, Oct 2, 2026, 12:28 PM UTC.