M2.6 earthquake Central California

A magnitude 2.6 earthquake struck in Central California on Mon, Oct 20, 1975, 6:09 AM PDT (13:09 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.8 1 km ESE of San Ardo, California. 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: 188 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 188.

From the USGS Earthquake Hazards Program and its partner networks, event nc1027079. Read Tue, Sep 22, 2026, 5:37 AM UTC.