California earthquakes

M1.9 earthquake 11 km ENE of Hydesville, California

A magnitude 1.9 earthquake struck 11 km ENE of Hydesville, California on Sun, Feb 8, 1987, 6:41 PM PST (02:41 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M4.1 7 km NE of Trinity Village, 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
1987-02-09 02:41:04 UTC
Depth
22.0 km (13.7 mi), shallow
Epicenter
40.573° N, 123.960° 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 1.1 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.25
Depth from
From location
Station coverage gap
109°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 34 in the 60 days after this one and 22 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc10083779. Read Fri, Oct 2, 2026, 1:16 AM UTC.