California earthquakes

M2.9 earthquake Central California

A magnitude 2.9 earthquake struck in Central California on Sat, Apr 6, 1985, 5:15 AM PST (13:15 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M3.1 12 km N of Morgan Hill, 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: 2.9 (md), micro
Local time: Sat, Apr 6, 1985, 5:15 AM PST
UTC: 1985-04-06 13:15:10 UTC
Depth: 7.3 km (4.5 mi), shallow
Epicenter: 36.583° N, 121.114° W
Region: California
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 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty: ±0.11
Depth from: From location
Station coverage gap: 31°
Stations used: 70

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 192 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 192.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc45456 (also filed as ci63874, usp0002dhq). Read Tue, Sep 22, 2026, 10:00 AM UTC.