Arkansas earthquakes

M2.7 earthquake Arkansas

A magnitude 2.7 earthquake struck in Arkansas on Sun, Feb 20, 2011, 12:22 PM CST (18:22 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.7 4 km NE of Greenbrier, Arkansas. This one was a foreshock.

Greenbrier forecast More in Arkansas

Map

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

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The earthquake

Magnitude: 2.7 (md), micro
Local time: Sun, Feb 20, 2011, 12:22 PM CST
UTC: 2011-02-20 18:22:05 UTC
Depth: 6.4 km (4.0 mi), shallow
Epicenter: 35.257° N, 92.351° W
Region: Arkansas
Felt reports: 22
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

22 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.7 km horizontally, 0.5 km in depth
Magnitude uncertainty: ±0.11
Depth from: From location
Station coverage gap: 75°
Stations used: 11

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 201 in the 60 days after this one and 104 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today Arkansas earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nm608419 (also filed as nm022011d, usp000huth). Read Mon, Sep 28, 2026, 10:06 PM UTC.