California earthquakes

M1.9 earthquake 13 km WNW of Round Mountain, California

A magnitude 1.9 earthquake struck 13 km WNW of Round Mountain, California on Fri, Apr 16, 1982, 5:24 PM PST (01:24 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M2.8 16 km NNE of Lookout, 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: 1.9 (Md, duration), micro
Magnitude from: Northern California Seismic System
Local time: Fri, Apr 16, 1982, 5:24 PM PST
UTC: 1982-04-17 01:24:06 UTC
Depth: 3.8 km (2.3 mi), shallow
Epicenter: 40.843° N, 122.084° W
Region: California
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 1.3 km horizontally, 8.2 km in depth
Magnitude uncertainty: ±0.40
Depth from: From location
Station coverage gap: 186°, poorly surrounded by stations
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: 35 in the 60 days after this one and 33 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1073767. Read Thu, Oct 1, 2026, 9:52 PM UTC.