California earthquakes

M2.1 earthquake 4km WNW of Dublin, CA

A magnitude 2.1 earthquake struck 4km WNW of Dublin, CA on Fri, Dec 18, 2020, 3:17 AM PST (11:17 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.2 4km SE of Aromas, CA. This one was a foreshock.

Dublin forecastMore in California

Map

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

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The earthquake

Magnitude
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2020-12-18 11:17:17 UTC
Depth
10.2 km (6.3 mi), shallow
Epicenter
37.710° N, 121.981° W
Felt reports
2
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

2 people reported to the USGS what they felt; the strongest reported shaking was II, 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
±0.17
Depth from
From location
Station coverage gap
48°
Stations used
96

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 96 in the 60 days after this one and 18 in the 30 days before it.

After

The first 60 of 96.

Before

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73499785. Read Sun, Oct 4, 2026, 6:59 AM UTC.