California earthquakes

M1.7 earthquake 2 km WNW of Round Valley, California

A magnitude 1.7 earthquake struck 2 km WNW of Round Valley, California on Wed, Dec 19, 1984, 4:45 AM PST (12:45 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M5.2 31 km ENE of Mono City, California. This one was a foreshock.

West Bishop forecastMore 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
1.7 (md), micro
Local time
UTC
1984-12-19 12:45:43 UTC
Depth
10.8 km (6.7 mi), shallow
Epicenter
37.431° N, 118.616° W
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
±0.17
Depth from
From location
Station coverage gap
70°
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc34812. Read Wed, Sep 30, 2026, 11:25 PM UTC.