California earthquakes

M2.4 earthquake 10 km ESE of Gilroy, California

A magnitude 2.4 earthquake struck 10 km ESE of Gilroy, California on Fri, Aug 23, 1985, 9:59 PM PDT (04:59 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.5 16 km NE of East Foothills, California. This one was a foreshock.

Gilroy forecastMore in California

Map

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

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The earthquake

Magnitude
2.4 (md), micro
Local time
UTC
1985-08-24 04:59:03 UTC
Depth
3.6 km (2.2 mi), shallow
Epicenter
36.967° N, 121.457° 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, 0.5 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
40°
Stations used
54

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 117 in the 60 days after this one and 71 in the 30 days before it.

After

The first 60 of 117.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc53677. Read Tue, Sep 29, 2026, 11:57 AM UTC.