California earthquakes

M1.7 earthquake 27km S of Lopez Point, CA

A magnitude 1.7 earthquake struck 27km S of Lopez Point, CA on Thu, Nov 18, 2021, 11:13 PM PST (07:13 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M3.2 8km NNW of Pinnacles, 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
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-11-19 07:13:06 UTC
Depth
15.5 km (9.6 mi), shallow
Epicenter
35.773° N, 121.563° 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 0.5 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
220°, poorly surrounded by stations
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 70 in the 60 days after this one and 45 in the 30 days before it.

After

The first 60 of 70.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73654855. Read Mon, Oct 5, 2026, 2:42 AM UTC.