California earthquakes

M1.5 earthquake 15 km NE of Mesa, California

A magnitude 1.5 earthquake struck 15 km NE of Mesa, California on Wed, Jul 30, 1986, 4:32 PM PDT (23:32 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M5.8 10 km NNE of Dixon Lane-Meadow Creek, California. This one was a foreshock.

Dixon Lane-Meadow Creek 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
1.5 (md), micro
Local time
UTC
1986-07-30 23:32:08 UTC
Depth
6.9 km (4.3 mi), shallow
Epicenter
37.528° N, 118.431° 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 0.3 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.26
Depth from
From location
Station coverage gap
71°
Stations used
13

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 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc88914. Read Mon, Sep 28, 2026, 10:46 PM UTC.