USGS Centroid Moment Solution


11/04/11 08:16:13.15

Epicenter:  36.987  140.399
MW 6.6

11/04/11 08:16:33.50
Centroid:  37.196  140.329
Depth  10         No. of sta: 102
Moment Tensor;   Scale 10**19 Nm
  Mrr=-1.18       Mtt= 0.66
  Mpp= 0.51       Mrt=-0.08
  Mrp=-0.22       Mtp=-0.27
 Principal axes:
  T  Val=  0.87  Plg= 2  Azm= 38
  N        0.34       8      128
  P       -1.21      81      295

Best Double Couple:Mo=1.0*10**19
 NP1:Strike=119 Dip=44 Slip=-102
 NP2:       316     48       -79

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