California earthquakes

M1.8 earthquake 18 km ENE of Swall Meadows, California

A magnitude 1.8 earthquake struck 18 km ENE of Swall Meadows, California on Tue, Aug 26, 1986, 9:26 AM PDT (16:26 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M1.9 22 km ENE 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: 1.8 (md), micro
Local time: Tue, Aug 26, 1986, 9:26 AM PDT
UTC: 1986-08-26 16:26:26 UTC
Depth: 5.5 km (3.4 mi), shallow
Epicenter: 37.577° N, 118.454° 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, 0.5 km in depth
Magnitude uncertainty: ±0.37
Depth from: From location
Station coverage gap: 46°
Stations used: 29

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 nc80353. Read Tue, Sep 22, 2026, 10:30 PM UTC.