Image
© USGS
Date-Time:
Friday, February 18, 2011 at 04:59:50 UTC

Thursday, February 17, 2011 at 10:59:50 PM at epicenter

Time of Earthquake in other Time Zones

Location:
35.257°N, 92.370°W

Depth:
5.1 km (3.2 miles)

Region:
ARKANSAS

Distances:
4 km (2 miles) NNE (29°) from Greenbrier, AR

8 km (5 miles) SE (143°) from Twin Groves, AR

8 km (5 miles) SSW (203°) from Guy, AR

58 km (36 miles) N (357°) from Little Rock, AR

420 km (261 miles) SSW (207°) from St. Louis, MO

Location Uncertainty:
horizontal +/- 0.6 km (0.4 miles); depth +/- 0.7 km (0.4 miles)

Parameters:
NST= 17, Nph= 25, Dmin=4 km, Rmss=0.17 sec, Gp= 54°, M-type="Nuttli" surface wave magnitude (mbLg), Version=B

Source:
Cooperative New Madrid Seismic Network

Event ID:
nm021811a