California earthquakes

M1.8 earthquake 7km NE of Grapevine, CA

A magnitude 1.8 earthquake struck 7km NE of Grapevine, CA on Fri, Jun 3, 1977, 2:05 PM PDT (21:05 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M3.2 9km SSW of Valencia, CA. This one was a foreshock.

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

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The earthquake

Magnitude
1.8 (Mh), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1977-06-03 21:05:13 UTC
Depth
11.8 km (7.4 mi), shallow
Epicenter
34.983° N, 118.875° 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 1.1 km horizontally, 2.3 km in depth
Depth from
From location
Station coverage gap
162°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 46 in the 60 days after this one and 37 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci9980346. Read Sun, Oct 4, 2026, 3:34 PM UTC.