California earthquakes

M3.7 earthquake 7 km ENE of Patterson, California

A magnitude 3.7 earthquake struck 7 km ENE of Patterson, California on Thu, Oct 13, 1977, 9:10 AM PDT (16:10 UTC), 15 km (9 mi) below the surface.

Patterson forecast More in California

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The earthquake

Magnitude: 3.7 (ml), minor
Local time: Thu, Oct 13, 1977, 9:10 AM PDT
UTC: 1977-10-13 16:10:27 UTC
Depth: 14.7 km (9.2 mi), shallow
Epicenter: 37.496° N, 121.046° 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 0.4 km horizontally, 0.6 km in depth
Depth from: From location
Station coverage gap: 50°
Stations used: 102

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 104 in the 60 days after this one and 50 in the 30 days before it.

After

The first 60 of 104.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1037238 (also filed as ci3335192, usp0000r18). Read Tue, Sep 22, 2026, 8:57 PM UTC.