California earthquakes

M1.7 earthquake 3 km NW of Swall Meadows, California

A magnitude 1.7 earthquake struck 3 km NW of Swall Meadows, California on Fri, Oct 11, 1985, 3:23 PM PDT (22:23 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M1.8 3 km NW of Swall Meadows, 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
1.7 (md), micro
Local time
UTC
1985-10-11 22:23:22 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
37.527° N, 118.673° 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
±0.18
Depth from
From location
Station coverage gap
38°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 53 in the 30 days before it.

After

The first 60 of 135.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc56821. Read Tue, Sep 22, 2026, 9:09 AM UTC.