M1.8 earthquake 4km ESE of Westmorland, CA

A magnitude 1.8 earthquake struck 4km ESE of Westmorland, CA on Mon, Aug 4, 1986, 6:52 AM PDT (13:52 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M3.8 5km NE of Delta, B.C., MX. 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 86 in the 30 days before it.

The first 60 of 175.

From the USGS Earthquake Hazards Program and its partner networks, event ci705708. Read Sun, Oct 4, 2026, 8:26 AM UTC.