Arkansas earthquakes

M2.5 earthquake 3 km S of Guy, Arkansas

A magnitude 2.5 earthquake struck 3 km S of Guy, Arkansas on Wed, Oct 20, 2010, 8:57 PM CDT (01:57 UTC), 4 km (3 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: 2.5 (Md, duration), micro
Magnitude from: NM
Local time: Wed, Oct 20, 2010, 8:57 PM CDT
UTC: 2010-10-21 01:57:38 UTC
Depth: 4.2 km (2.6 mi), shallow
Epicenter: 35.295° N, 92.327° W
Region: Arkansas
Felt reports: 3
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
2.5	Md, duration	NM	Preferred · Reviewed · ±0.149 · 5 stations
2.5	Md, duration	USGS National Earthquake Information Center	Reviewed

What happened

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

Felt at Greenbrier and Searcy.

From the USGS event page for nm607683. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

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

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.6 km horizontally, 0.7 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 82°
Stations used: 9

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 123 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 nm607683 (also filed as nm102110a, usp000hnbt). Read Sun, Oct 4, 2026, 1:36 PM UTC.