M2.7 earthquake 19 km NNW of Coalinga, California

A magnitude 2.7 earthquake struck 19 km NNW of Coalinga, California on Sat, Aug 6, 1988, 10:43 PM PDT (05:43 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M3.3 8 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
2.69	Md, duration	Northern California Seismic System	Preferred · Final · ±0.16 · 30 stations
3.28	ML, local (Richter)	Southern California Seismic Network	Final · 4 stations

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: 164 in the 60 days after this one and at least 200 in the 30 days before it.

The first 60 of 164.

From the USGS Earthquake Hazards Program and its partner networks, event nc121921 (also filed as ci1007134). Read Thu, Oct 1, 2026, 5:53 AM UTC.