California earthquakes

M1.5 earthquake 17 km ENE of Swall Meadows, California

A magnitude 1.5 earthquake struck 17 km ENE of Swall Meadows, California on Fri, Nov 21, 1986, 5:29 AM PST (13:29 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M1.6 19 km ENE of Mono City, 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: 1.5 (md), micro
Local time: Fri, Nov 21, 1986, 5:29 AM PST
UTC: 1986-11-21 13:29:00 UTC
Depth: 6.7 km (4.2 mi), shallow
Epicenter: 37.580° N, 118.467° 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 0.3 km horizontally, 0.8 km in depth
Magnitude uncertainty: ±0.28
Depth from: From location
Station coverage gap: 113°
Stations used: 12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc88430. Read Tue, Sep 22, 2026, 8:21 PM UTC.