M2.6 earthquake 19 km SSW of Volta, California

A magnitude 2.6 earthquake struck 19 km SSW of Volta, California on Fri, May 5, 1978, 5:07 AM PDT (12:07 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.3 6 km N of Biola, 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: 175 in the 60 days after this one and 5 in the 30 days before it.

The first 60 of 175.

From the USGS Earthquake Hazards Program and its partner networks, event nc1040137. Read Tue, Sep 22, 2026, 9:25 PM UTC.