Magnitude 4.0 Earthquake of SOUTHEASTERN MISSOURI 2012 February 21

2012 February 21 09:58:43 UTC: SOUTHEASTERN MISSOURI

Magnitude: 4.0

Date-Time : Tuesday, February 21, 2012 at 09:58:43 UTC
Tuesday, February 21, 2012 at 03:58:43 AM at epicenter

Location : 36.850°N, 89.409°W

Depth : 5 km (3.1 miles)

Region : SOUTHEASTERN MISSOURI

Distances:

a) 8 km (5 miles) NNW (345°) from East Prairie, MO

b) 8 km (5 miles) WNW (291°) from Anniston, MO

c) 186 km (115 miles) W (281°) from Clarksville, TN

d) 211 km (131 miles) SSE (159°) from St. Louis, MO

Location Uncertainty: horizontal +/- 8.7 km (5.4 miles); depth +/- 3 km (1.9 miles)

Parameters : NST=155, Nph=173, Dmin=54.5 km, Rmss=1.29 sec, Gp= 18°, M-type=body wave magnitude (Mb), Version=7