USGS WPhase Moment Solution

NEAR N COAST OF PAPUA, INDONESIA

12/ 4/21  1:16:52.00

Epicenter:  -1.603  134.274
MW 6.6

USGS/WPHASE CENTROID MOMENT TENSOR
12/ 4/21  1:16:52.00
Centroid:   -1.603  134.474
Depth  15         No. of sta: 41
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.29       Mtt=-0.02
  Mpp= 0.31       Mrt= 0.03
  Mrp= 0.50       Mtp= 1.02
 Principal axes:
  T  Val=  1.28  Plg=14  Azm=308
  N     = -0.25      60      190
  P     = -1.02      24       45

Best Double Couple:Mo=1.2*10**19
 NP1:Strike= 85 Dip=62 Slip=  -7
 NP2:       178     83      -151

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.