California earthquakes

M1.6 earthquake 16km S of Trona, CA

A magnitude 1.6 earthquake struck 16km S of Trona, CA on Tue, Oct 12, 2021, 8:53 PM PDT (03:53 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M4.0 15km ESE of Olancha, CA. 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
1.6 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2021-10-13 03:53:30 UTC
Depth
9.0 km (5.6 mi), shallow
Epicenter
35.623° N, 117.406° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
110°
Stations used
37

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 145 in the 60 days after this one and 63 in the 30 days before it.

After

The first 60 of 145.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci40068624. Read Sat, Oct 3, 2026, 10:03 PM UTC.