USGS/SLU Regional Moment Solution

EASTERN KENTUCKY

12/11/10 17:08:12.93

Epicenter:  37.124  -82.954
MW 4.2

USGS/SLU REGIONAL MOMENT TENSOR
Depth  13         No. of sta: 50
Moment Tensor;   Scale 10**15 Nm
  Mrr=-0.66       Mtt= 1.70
  Mpp=-1.04       Mrt=-0.80
  Mrp= 0.58       Mtp= 1.29
 Principal axes:
  T  Val=  2.31  Plg=11  Azm=161
  N       -0.24      56      267
  P       -2.07      32       64

Best Double Couple:Mo=2.2*10**15
 NP1:Strike=109 Dip=76 Slip= -31
 NP2:       207     60      -164

Moment Tensor Solution
The figure above shows a visual representation of the style of faulting (focal mechanism) derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away from the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The dots represent the axis of maximum compressional strain (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis") resulting from the earthquake.

Moment Tensor Solution