California earthquakes

M1.7 earthquake 14 km NE of Mesa, California

A magnitude 1.7 earthquake struck 14 km NE of Mesa, California on Thu, Feb 26, 1987, 7:41 PM PST (03:41 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M2.0 23 km ESE of Yosemite Valley, 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
1.7 (md), micro
Local time
UTC
1987-02-27 03:41:24 UTC
Depth
4.0 km (2.5 mi), shallow
Epicenter
37.525° N, 118.447° 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
±0.15
Depth from
From location
Station coverage gap
55°
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 194 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 194.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1147721. Read Tue, Sep 22, 2026, 3:33 PM UTC.