California earthquakes

M2.6 earthquake 9 km SW of Swall Meadows, California

A magnitude 2.6 earthquake struck 9 km SW of Swall Meadows, California on Fri, Jun 11, 1982, 12:21 AM PDT (07:21 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M3.8 15 km SW of Aspen Springs, 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: 2.6 (Md, duration), micro
Magnitude from: Northern California Seismic System
Local time: Fri, Jun 11, 1982, 12:21 AM PDT
UTC: 1982-06-11 07:21:28 UTC
Depth: 13.0 km (8.1 mi), shallow
Epicenter: 37.437° N, 118.704° W
Region: California
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.65	Md, duration	Northern California Seismic System	Preferred · Final · ±0.21 · 6 stations
2.77	Mc	Southern California Seismic Network	Final · 8 stations

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 0.4 km horizontally, 0.9 km in depth
Magnitude uncertainty: ±0.21
Depth from: From location
Station coverage gap: 84°
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 200 in the 60 days after this one and 69 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1075249 (also filed as ci532372). Read Fri, Oct 2, 2026, 2:13 PM UTC.