Magnitude 4.7 - ARKANSAS
2011 February 28 05:00:50 UTC
DetailsSummaryMapsScientific & TechnicalAdditional InfoEarthquake Details
This event has been reviewed by a seismologist.
Magnitude 4.7
Date-Time Monday, February 28, 2011 at 05:00:50 UTC
Sunday, February 27, 2011 at 11:00:50 PM at epicenter
Time of Earthquake in other Time Zones
Location 35.265°N, 92.344°W
Depth 3.8 km (2.4 miles)
Region ARKANSAS
Distances 6 km (4 miles) NE (46°) from Greenbrier, AR
7 km (4 miles) S (187°) from Guy, AR
9 km (6 miles) SE (128°) from Twin Groves, AR
59 km (37 miles) N (359°) from Little Rock, AR
418 km (260 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= 14, Nph= 20, Dmin=3 km, Rmss=0.18 sec, Gp= 68°,
M-type=centroid moment magnitude (Mw), Version=B
Source Cooperative New Madrid Seismic Network
Event ID nm022811a
http://earthquake.usgs.gov/earthquakes/ ... 22811a.php