California earthquakes

M4.3 earthquake 14km NNE of Lamont, CA

A magnitude 4.3 earthquake struck 14km NNE of Lamont, CA on Tue, Dec 18, 1990, 8:56 AM PST (16:56 UTC), 5 km (3 mi) below the surface.

Fuller Acres 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: 4.3 (ML, local (Richter)), light
Magnitude from: Southern California Seismic Network
Local time: Tue, Dec 18, 1990, 8:56 AM PST
UTC: 1990-12-18 16:56:43 UTC
Depth: 5.0 km (3.1 mi), shallow
Epicenter: 35.374° N, 118.846° W
Region: California
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
4.25	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · 9 stations
4.2	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

What happened

The USGS’s account of the effects of this earthquake.

Felt (V) at Bakersfield; (IV) at Di Giorgio, Edison, Lamont and Posey; (III) at California Hot Spring, Delano, Glennville, Lake Isabella, Lemoncove, Porterville and Woodville.

From the USGS event page for ci688784. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from: From location
Station coverage gap: 51°
Stations used: 0

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 88 in the 60 days after this one and 36 in the 30 days before it.

After

The first 60 of 88.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci688784 (also filed as usp0004ja8). Read Mon, Oct 5, 2026, 7:35 AM UTC.