California earthquakes

M2.1 earthquake 5km NE of New Idria, CA

A magnitude 2.1 earthquake struck 5km NE of New Idria, CA on Sun, Oct 24, 2021, 12:08 AM PDT (07:08 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M4.7 18km NW of San Simeon, 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-10-24 07:08:56 UTC
Depth
13.3 km (8.3 mi), shallow
Epicenter
36.452° N, 120.632° 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
±0.19
Depth from
From location
Station coverage gap
67°
Stations used
62

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 132 in the 60 days after this one and 65 in the 30 days before it.

After

The first 60 of 132.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73643970. Read Mon, Oct 5, 2026, 9:38 AM UTC.