California earthquakes

M1.9 earthquake 18 km SSE of Livermore, California

A magnitude 1.9 earthquake struck 18 km SSE of Livermore, California on Thu, Nov 29, 1990, 11:35 PM PST (07:35 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.1 3 km W of San Juan Bautista, 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-11-30 07:35:22 UTC
Depth
5.8 km (3.6 mi), shallow
Epicenter
37.529° N, 121.680° 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
±0.10
Depth from
From location
Station coverage gap
42°
Stations used
57

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 97 in the 60 days after this one and 65 in the 30 days before it.

After

The first 60 of 97.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc201503. Read Sun, Oct 4, 2026, 9:20 AM UTC.