USGS Centroid Moment Solution


12/08/31 12:47:34.48

Epicenter:  10.831  126.651
MW 7.6

12/08/31 12:47:58.00
Centroid:  10.992  127.028
Depth  44         No. of sta: 181
Moment Tensor;   Scale 10**20 Nm
  Mrr= 3.25       Mtt= 0.23
  Mpp=-3.48       Mrt=-0.34
  Mrp=-0.49       Mtp=-0.32
 Principal axes:
  T  Val=  3.32  Plg=83  Azm=147
  N        0.23       5        6
  P       -3.54       4      275

Best Double Couple:Mo=3.4*10**20
 NP1:Strike=359 Dip=41 Slip=  82
 NP2:       190     50        97

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