M1.6 earthquake 20km NE of Pine Valley, CA

A magnitude 1.6 earthquake struck 20km NE of Pine Valley, CA on Mon, Apr 27, 1981, 12:52 PM PDT (19:52 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M1.7 11km ESE of North Shore, CA. 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: 192 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 192.

From the USGS Earthquake Hazards Program and its partner networks, event ci520554. Read Wed, Sep 23, 2026, 2:37 AM UTC.