California earthquakes

M3.9 earthquake 12km WSW of Niland, CA

A magnitude 3.9 earthquake struck 12km WSW of Niland, CA on Fri, Jun 11, 2021, 9:30 PM PDT (04:30 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.3 12km WSW of Niland, CA. This one was a foreshock.

Niland forecast More in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.9 (Mw, moment), minor
Magnitude from: Southern California Seismic Network
Local time: Fri, Jun 11, 2021, 9:30 PM PDT
UTC: 2021-06-12 04:30:28 UTC
Depth: 2.8 km (1.7 mi), shallow
Epicenter: 33.207° N, 115.647° W
Region: California
Felt reports: 1
Strongest shaking: IV, light shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.85	Mw, moment	Southern California Seismic Network	Preferred · Final · 4 stations
3.7	Mwr, regional moment	USGS National Earthquake Information Center	Reviewed · ±0.031 · 98 stations
4.08	Mw, moment	EW	Preliminary · ±0.3982 · 4 stations

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: IV, light shaking
Peak ground acceleration: 2.2% of gravity
Peak ground velocity: -0.5 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt shaking.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Strike-slip
Moment magnitude: 3.7 Mwr
Nodal plane 1: Strike 160°, dip 86°, rake 174°
Nodal plane 2: Strike 251°, dip 84°, rake 4°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.2 km horizontally, 0.3 km in depth
Depth from: From location
Station coverage gap: 25°
Stations used: 75

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 197 in the 60 days after this one and 198 in the 30 days before it.

After

The first 60 of 197.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci39936136 (also filed as ew1623472227, us7000ecal). Read Sun, Oct 4, 2026, 4:47 PM UTC.