California earthquakes

M1.7 earthquake 11 km W of Huron, California

A magnitude 1.7 earthquake struck 11 km W of Huron, California on Mon, Aug 26, 1991, 9:58 PM PDT (04:58 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M4.0 9 km ENE of Coalinga, 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1991-08-27 04:58:50 UTC
Depth
14.5 km (9.0 mi), shallow
Epicenter
36.192° N, 120.232° 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
±0.18
Depth from
From location
Station coverage gap
78°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 102 in the 60 days after this one and 40 in the 30 days before it.

After

The first 60 of 102.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc229017 (also filed as ci152476). Read Mon, Oct 5, 2026, 8:14 AM UTC.