California earthquakes

M1.6 earthquake 19 km NE of Mesa, California

A magnitude 1.6 earthquake struck 19 km NE of Mesa, California on Thu, Feb 5, 1987, 3:35 PM PST (23:35 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.0 14 km W of Aspen Springs, 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
1.6 (md), micro
Local time
UTC
1987-02-05 23:35:04 UTC
Depth
3.3 km (2.0 mi), shallow
Epicenter
37.561° N, 118.420° 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 0.2 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
65°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 146 in the 30 days before it.

After

The first 60 of at least 199.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc93990. Read Tue, Sep 29, 2026, 11:52 PM UTC.