California earthquakes

M1.9 earthquake 10 km NNE of Avenal, California

A magnitude 1.9 earthquake struck 10 km NNE of Avenal, California on Sat, Mar 21, 1987, 4:44 PM PST (00:44 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.7 7 km NE of Avenal, 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-03-22 00:44:56 UTC
Depth
9.7 km (6.0 mi), shallow
Epicenter
36.081° N, 120.070° 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 0.5 km horizontally, 0.2 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
206°, poorly surrounded by stations
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 84 in the 60 days after this one and 51 in the 30 days before it.

After

The first 60 of 84.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc97229 (also filed as ci719137). Read Fri, Oct 2, 2026, 2:14 AM UTC.