California earthquakes

M1.8 earthquake 21 km ENE of Swall Meadows, California

A magnitude 1.8 earthquake struck 21 km ENE of Swall Meadows, California on Sun, Aug 24, 1986, 9:11 AM PDT (16:11 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.4 1 km E of Bishop, 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: Sun, Aug 24, 1986, 9:11 AM PDT
UTC: 1986-08-24 16:11:00 UTC
Depth: 4.6 km (2.8 mi), shallow
Epicenter: 37.610° N, 118.440° 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, 0.6 km in depth
Magnitude uncertainty: ±0.29
Depth from: From location
Station coverage gap: 38°
Stations used: 32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and 199 in the 30 days before it.

After

The first 60 of at least 202.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc80021 (also filed as ci707825). Read Mon, Sep 28, 2026, 12:29 PM UTC.