California earthquakes

M2.3 earthquake 18 km ENE of Swall Meadows, California

A magnitude 2.3 earthquake struck 18 km ENE of Swall Meadows, California on Thu, Aug 28, 1986, 2:37 AM PDT (09:37 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.9 11 km NNE of Dixon Lane-Meadow Creek, California. This one was a foreshock.

Dixon Lane-Meadow Creek forecast More in California

Map

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

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The earthquake

Magnitude: 2.3 (md), micro
Local time: Thu, Aug 28, 1986, 2:37 AM PDT
UTC: 1986-08-28 09:37:05 UTC
Depth: 5.4 km (3.4 mi), shallow
Epicenter: 37.572° N, 118.450° 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 0.2 km horizontally, 0.4 km in depth
Magnitude uncertainty: ±0.31
Depth from: From location
Station coverage gap: 71°
Stations used: 39

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 nc80558 (also filed as ci708117). Read Tue, Sep 22, 2026, 10:35 PM UTC.