M2.5 earthquake 10 km SSE of Walker, California

A magnitude 2.5 earthquake struck 10 km SSE of Walker, California on Tue, Oct 27, 1987, 4:05 PM PST (00:05 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.9 8 km SW of Markleeville, 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: 51 in the 60 days after this one and 29 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event nc107733. Read Tue, Sep 22, 2026, 7:51 PM UTC.