California earthquakes

M1.7 earthquake 8km E of Gilroy, CA

A magnitude 1.7 earthquake struck 8km E of Gilroy, CA on Tue, Mar 16, 2021, 7:04 PM PDT (02:04 UTC), 5 km (3 mi) below the surface.

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

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Map

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

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The earthquake

Magnitude
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-03-17 02:04:59 UTC
Depth
5.5 km (3.4 mi), shallow
Epicenter
37.016° N, 121.478° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.2 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
46°
Stations used
51

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 142 in the 60 days after this one and 62 in the 30 days before it.

After

The first 60 of 142.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73538265. Read Sat, Oct 3, 2026, 6:17 PM UTC.