USGS WPhase Moment Solution

NEAR S COAST OF PAPUA, INDONESIA

12/10/12  0:31:30.00

Epicenter:  -4.841  134.084
MW 6.6

USGS/WPHASE CENTROID MOMENT TENSOR
12/10/12  0:31:30.00
Centroid:   -4.741  133.984
Depth  15         No. of sta: 26
Moment Tensor;   Scale 10**18 Nm
  Mrr=-8.67       Mtt= 0.38
  Mpp= 8.29       Mrt=-2.90
  Mrp=-4.45       Mtp= 0.84
 Principal axes:
  T  Val=  9.64  Plg=14  Azm= 99
  N     =  0.77      10      192
  P     =-10.41      71      317

Best Double Couple:Mo=1.0*10**19
 NP1:Strike=174 Dip=32 Slip=-111
 NP2:        19     61       -77

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.