California earthquakes

M1.6 earthquake 7 km NNE of Coalinga, California

A magnitude 1.6 earthquake struck 7 km NNE of Coalinga, California on Tue, Aug 21, 1984, 7:04 AM PDT (14:04 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.0 21 km NE of Soledad, California. This one was a foreshock.

Coalinga forecastMore in California

Map

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

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The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-08-21 14:04:02 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
36.203° N, 120.337° 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 0.8 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
149°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 178 in the 60 days after this one and 89 in the 30 days before it.

After

The first 60 of 178.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc26041. Read Thu, Oct 1, 2026, 10:06 AM UTC.