California earthquakes

M4.7 earthquake 2 km NNW of Palermo, California

A magnitude 4.7 earthquake struck 2 km NNW of Palermo, California on Fri, Aug 1, 1975, 9:27 AM PDT (16:27 UTC), 6 km (3 mi) below the surface.

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The earthquake

Magnitude: 4.7 (ml), light
Local time: Fri, Aug 1, 1975, 9:27 AM PDT
UTC: 1975-08-01 16:27:18 UTC
Depth: 5.5 km (3.4 mi), shallow
Epicenter: 39.453° N, 121.548° 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, 1.0 km in depth
Depth from: From location
Station coverage gap: 116°
Stations used: 31

Nearest places

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

Nearby

Within 100 km, magnitude 1.7 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 nc1024985 (also filed as ushis3354, iscgem724578, usp0000c90). Read Tue, Sep 22, 2026, 10:58 AM UTC.