California earthquakes

M1.8 earthquake 9 km N of Coalinga, California

A magnitude 1.8 earthquake struck 9 km N of Coalinga, California on Fri, Oct 12, 1990, 9:49 PM PDT (04:49 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M4.0 11 km SSW of Oak Shores, California. 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 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-10-13 04:49:30 UTC
Depth
11.6 km (7.2 mi), shallow
Epicenter
36.228° N, 120.353° 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 0.4 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
101°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 129 in the 60 days after this one and 75 in the 30 days before it.

After

The first 60 of 129.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc165236 (also filed as ci2006236). Read Sat, Oct 3, 2026, 10:49 PM UTC.