Arkansas earthquakes

M3.4 earthquake 4 km S of Guy, Arkansas

A magnitude 3.4 earthquake struck 4 km S of Guy, Arkansas on Mon, Feb 28, 2011, 2:46 AM CST (08:46 UTC), 2 km (2 mi) below the surface.

A larger quake followed: M3.9 3 km NE of Greenbrier, Arkansas. This one was a foreshock.

Guy 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: 3.4 (mw), minor
Local time: Mon, Feb 28, 2011, 2:46 AM CST
UTC: 2011-02-28 08:46:11 UTC
Depth: 2.5 km (1.5 mi), shallow
Epicenter: 35.282° N, 92.341° W
Region: Arkansas
Felt reports: 113
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

113 people reported to the USGS what they felt; the strongest reported shaking was V, moderate 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
Nodal plane 1: Strike 115°, dip 85°, rake -15°
Nodal plane 2: Strike 206°, dip 75°, rake -175°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.5 km horizontally, 0.5 km in depth
Magnitude uncertainty: ±0.48
Depth from: From location
Station coverage gap: 54°
Stations used: 17

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 202 in the 60 days after this one and 190 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Arkansas earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nm608518 (also filed as nm022811c, usp000hv60). Read Sun, Sep 27, 2026, 9:39 AM UTC.