California earthquakes

M1.7 earthquake 18km NW of Parkfield, CA

A magnitude 1.7 earthquake struck 18km NW of Parkfield, CA on Wed, May 26, 2021, 4:46 AM PDT (11:46 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.6 3km NE 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
2021-05-26 11:46:46 UTC
Depth
3.9 km (2.4 mi), shallow
Epicenter
36.016° N, 120.573° 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, 0.4 km in depth
Magnitude uncertainty
±0.29
Depth from
From location
Station coverage gap
108°
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: 101 in the 60 days after this one and 58 in the 30 days before it.

After

The first 60 of 101.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73565536. Read Sun, Oct 4, 2026, 9:16 AM UTC.