California earthquakes

M2.3 earthquake 20km NW of Grapevine, CA

A magnitude 2.3 earthquake struck 20km NW of Grapevine, CA on Sun, Sep 23, 1984, 1:29 AM PDT (08:29 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M3.5 8km WSW of Tehachapi, CA. This one was a foreshock.

Greenfield 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
2.3 (Mc), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1984-09-23 08:29:58 UTC
Depth
14.6 km (9.1 mi), shallow
Epicenter
35.081° N, 119.069° 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.

Depth from
From location
Station coverage gap
96°
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: 50 in the 60 days after this one and 29 in the 30 days before it.

After

Before

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci52825. Read Sat, Oct 3, 2026, 10:44 AM UTC.