California earthquakes

M2.4 earthquake 5km SSW of Redlands, CA

A magnitude 2.4 earthquake struck 5km SSW of Redlands, CA on Sat, Jan 9, 2021, 11:40 AM PST (19:40 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.5 2km W of Willowbrook, CA. This one was a foreshock.

Redlands forecastMore in California

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
2.4 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2021-01-09 19:40:57 UTC
Depth
9.3 km (5.7 mi), shallow
Epicenter
34.019° N, 117.208° W
Felt reports
3
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

3 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.1 km horizontally, 0.2 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
32°
Stations used
105

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 111 in the 60 days after this one and 59 in the 30 days before it.

After

The first 60 of 111.

Before

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci39752456. Read Sat, Oct 3, 2026, 12:15 PM UTC.