California earthquakes

M4.7 earthquake 8 km SW of Huron, California

A magnitude 4.7 earthquake struck 8 km SW of Huron, California on Sun, Aug 4, 1985, 4:29 AM PDT (11:29 UTC), 13 km (8 mi) below the surface.

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The earthquake

Magnitude: 4.7 (ml), light
Local time: Sun, Aug 4, 1985, 4:29 AM PDT
UTC: 1985-08-04 11:29:15 UTC
Depth: 13.2 km (8.2 mi), shallow
Epicenter: 36.139° N, 120.159° 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: 130°
Stations used: 67

Nearest places

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

Nearby

Within 100 km, magnitude 1.7 and up: 199 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 199.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc52202 (also filed as ci69892, ushis3894, usp0002hc4). Read Thu, Sep 24, 2026, 4:41 AM UTC.