USGS WPhase Moment Solution

E. RUSSIA-N.E. CHINA BORDER REG.

13/ 4/ 5 13: 0:2.00

Epicenter:  42.712  131.105
MW 6.3

USGS/WPHASE CENTROID MOMENT TENSOR
13/ 4/ 5 13: 0: 2.00
Centroid:   42.712  131.241
Depth 560         No. of sta: 51
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.69       Mtt=-0.38
  Mpp=-0.31       Mrt= 0.29
  Mrp=-3.19       Mtp= 0.43
 Principal axes:
  T  Val=  3.41  Plg=49  Azm= 91
  N     = -0.28       7      352
  P     = -3.13      39      256

Best Double Couple:Mo=3.3*10**18
 NP1:Strike=296 Dip= 9 Slip=  33
 NP2:       173     85        98

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

Details on the W-phase inversion algorithm.