California earthquakes

M2.8 earthquake 18km NW of Grapevine, CA

A magnitude 2.8 earthquake struck 18km NW of Grapevine, CA on Mon, Jun 21, 1982, 9:42 PM PDT (04:42 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.2 6km ESE of Buttonwillow, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.8 (mc), micro
Local time
UTC
1982-06-22 04:42:48 UTC
Depth
4.6 km (2.9 mi), shallow
Epicenter
35.054° N, 119.067° 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
Operator assigned
Station coverage gap
112°
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: 51 in the 60 days after this one and 82 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci504362. Read Wed, Sep 23, 2026, 12:52 AM UTC.