California earthquakes

M1.8 earthquake 16km NE of Upper Lake, CA

A magnitude 1.8 earthquake struck 16km NE of Upper Lake, CA on Sun, Jun 13, 2021, 11:44 AM PDT (18:44 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M4.0 7km WNW of The Geysers, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-06-13 18:44:21 UTC
Depth
2.2 km (1.3 mi), shallow
Epicenter
39.274° N, 122.797° 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, 1.9 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
69°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 104 in the 30 days before it.

After

The first 60 of at least 199.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73574011. Read Sat, Oct 3, 2026, 4:58 PM UTC.