California earthquakes

M1.7 earthquake 2 km ENE of Berkeley, California

A magnitude 1.7 earthquake struck 2 km ENE of Berkeley, California on Thu, Dec 8, 1977, 10:09 AM PST (18:09 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.7 5 km WNW of Broadmoor, California. 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
1.7 (md), micro
Local time
UTC
1977-12-08 18:09:25 UTC
Depth
8.3 km (5.1 mi), shallow
Epicenter
37.881° N, 122.245° 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 0.1 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
35°
Stations used
36

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 52 in the 60 days after this one and 34 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1038059. Read Tue, Sep 22, 2026, 2:47 PM UTC.