California earthquakes

M1.8 earthquake 12 km ESE of Gilroy, California

A magnitude 1.8 earthquake struck 12 km ESE of Gilroy, California on Sat, Oct 19, 1985, 12:21 PM PDT (19:21 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.4 3 km WSW of San Juan Bautista, California. 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
1.8 (md), micro
Local time
UTC
1985-10-19 19:21:27 UTC
Depth
4.8 km (3.0 mi), shallow
Epicenter
36.971° N, 121.430° 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, 0.3 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
49°
Stations used
53

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 158 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 158.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc57275. Read Tue, Sep 22, 2026, 10:34 PM UTC.