M1.9 earthquake 11 km ENE of Blackhawk, California

A magnitude 1.9 earthquake struck 11 km ENE of Blackhawk, California on Tue, Feb 12, 1980, 12:57 PM PST (20:57 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M3.0 11 km ESE of Livermore, 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: 131 in the 60 days after this one and 38 in the 30 days before it.

The first 60 of 131.

From the USGS Earthquake Hazards Program and its partner networks, event nc1051021. Read Tue, Sep 22, 2026, 5:28 PM UTC.