USGS WPhase Moment Solution

11/04/11  8:16:13

Epicenter:  37.006  140.476
MW 6.6

USGS/WPHASE CENTROID MOMENT TENSOR
11/04/11 08:16:13.00
Centroid:   37.006  140.676
Depth  15         No. of sta: 47
Moment Tensor;   Scale 10**19 Nm
  Mrr=-1.06       Mtt= 0.48
  Mpp= 0.57       Mrt=-0.02
  Mrp= 0.02       Mtp=-0.15
 Principal axes:
  T  Val=  0.68  Plg= 0  Azm=233
  N     =  0.37       0      143
  P     = -1.06      89       45

Best Double Couple:Mo=0.9*10**19
 NP1:Strike=324 Dip=44 Slip= -89
 NP2:       143     46       -90

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 form 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