M1.5 earthquake 8km WSW of Williams, CA

A magnitude 1.5 earthquake struck 8km WSW of Williams, CA on Thu, Jul 1, 2021, 5:18 AM PDT (12:18 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.7 12km W of Alder Springs, 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: at least 199 in the 60 days after this one and 81 in the 30 days before it.

The first 60 of at least 199.

From the USGS Earthquake Hazards Program and its partner networks, event nc73581726. Read Sat, Oct 3, 2026, 3:02 PM UTC.