California earthquakes

M1.7 earthquake 28km W of Olancha, CA

A magnitude 1.7 earthquake struck 28km W of Olancha, CA on Fri, Apr 5, 1985, 10:25 PM PST (06:25 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M1.9 13km NE of Inyokern, CA. This one was a foreshock.

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

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The earthquake

Magnitude
1.7 (mc), micro
Local time
UTC
1985-04-06 06:25:27 UTC
Depth
4.4 km (2.7 mi), shallow
Epicenter
36.293° N, 118.318° 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.

Depth from
Operator assigned
Station coverage gap
318°, poorly surrounded by stations
Stations used
0

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 58 in the 60 days after this one and 25 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci63817. Read Tue, Sep 22, 2026, 12:19 PM UTC.