Arkansas earthquakes

M3.5 earthquake 4 km S of Guy, Arkansas

A magnitude 3.5 earthquake struck 4 km S of Guy, Arkansas on Sat, Oct 16, 2010, 4:43 AM CDT (09:43 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.9 2 km ESE of Guy, 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: 3.5 (Mw, moment), minor
Magnitude from: NM
Local time: Sat, Oct 16, 2010, 4:43 AM CDT
UTC: 2010-10-16 09:43:18 UTC
Depth: 6.0 km (3.7 mi), shallow
Epicenter: 35.288° N, 92.333° W
Region: Arkansas
Felt reports: 61
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
3.5	Mw, moment	NM	Preferred · Reviewed · ±0.957 · 6 stations
3.5	Mwr, regional moment	USGS National Earthquake Information Center	Reviewed

What happened

The USGS’s account of the effects of this earthquake.

Felt (II) at Greenbrier, Mountain View and Quitman. Also felt at Batesville, Corning, Cotter, Drasco, Eureka Springs, Glencoe, Guion, Hardy, Harriet, Harrison, Heber Springs, Marshall, Mount Vernon, Mountain Home, Parthenon, Peel, Rogers, Rose Bud and Springdale. Felt at Coahoma, Mississippi.

From the USGS event page for nm607654. U.S. Geological Survey text and figures are in the public domain.

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
Map: Automatic

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

Did you feel it?

61 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 305°, dip 80°, rake 25°
Nodal plane 2: Strike 210°, dip 65°, rake 169°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.5 km horizontally, 0.4 km in depth
Magnitude uncertainty: ±0.96
Depth from: From location
Station coverage gap: 74°
Stations used: 19

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 200 in the 60 days after this one and 96 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Arkansas earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nm607654 (also filed as nm101610b, usp000hn5s). Read Sat, Oct 3, 2026, 11:32 AM UTC.