California earthquakes

M2.1 earthquake 12km NNW of Piru, CA

A magnitude 2.1 earthquake struck 12km NNW of Piru, CA on Mon, Jun 28, 2021, 2:49 PM PDT (21:49 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M3.4 18km NW of Grapevine, CA. 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
2.1 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2021-06-28 21:49:43 UTC
Depth
13.4 km (8.3 mi), shallow
Epicenter
34.519° N, 118.829° 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, 0.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
22°
Stations used
60

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 24 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci39722511. Read Sun, Oct 4, 2026, 9:20 AM UTC.