California earthquakes

M3.5 earthquake 22 km NNE of Soledad, California

A magnitude 3.5 earthquake struck 22 km NNE of Soledad, California on Tue, Oct 18, 1977, 3:08 AM PDT (10:08 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.7 6 km NW of Parkfield, California. This one was a foreshock.

Soledad forecast More in California

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 3.5 (ml), minor
Local time: Tue, Oct 18, 1977, 3:08 AM PDT
UTC: 1977-10-18 10:08:18 UTC
Depth: 9.0 km (5.6 mi), shallow
Epicenter: 36.601° N, 121.214° 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, 0.3 km in depth
Depth from: From location
Station coverage gap: 30°
Stations used: 69

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 186 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 186.

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1037313 (also filed as ci3335273, usp0000r3g). Read Tue, Sep 22, 2026, 10:02 AM UTC.