California earthquakes

M1.6 earthquake 2 km WNW of Round Valley, California

A magnitude 1.6 earthquake struck 2 km WNW of Round Valley, California on Mon, May 20, 1985, 11:52 AM PDT (18:52 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M1.6 9 km ESE of Mammoth Lakes, CA. This one was a foreshock.

West Bishop 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: 1.6 (md), micro
Local time: Mon, May 20, 1985, 11:52 AM PDT
UTC: 1985-05-20 18:52:03 UTC
Depth: 10.4 km (6.5 mi), shallow
Epicenter: 37.426° N, 118.616° 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: ±0.25
Depth from: From location
Station coverage gap: 73°
Stations used: 27

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 183 in the 60 days after this one and 16 in the 30 days before it.

After

The first 60 of 183.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc48147. Read Tue, Sep 22, 2026, 9:40 PM UTC.