M1.8 earthquake 10km E of Gilroy, CA

A magnitude 1.8 earthquake struck 10km E of Gilroy, CA on Mon, Mar 22, 2021, 9:12 AM PDT (16:12 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M3.6 15km N of Morgan Hill, CA. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 132 in the 60 days after this one and 73 in the 30 days before it.

The first 60 of 132.

From the USGS Earthquake Hazards Program and its partner networks, event nc73540660. Read Sat, Oct 3, 2026, 6:20 PM UTC.