USGS WPhase Moment Solution

SULAWESI, INDONESIA

12/ 8/18  9:41:54.00

Epicenter:  -1.346  120.104
MW 6.3

USGS/WPHASE CENTROID MOMENT TENSOR
12/ 8/18  9:41:54.00
Centroid:   -1.346  120.504
Depth  13         No. of sta: 38
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.13       Mtt= 1.92
  Mpp=-1.79       Mrt=-1.03
  Mrp=-0.43       Mtp=-2.29
 Principal axes:
  T  Val=  3.18  Plg=13  Azm=203
  N     = -0.06      69       76
  P     = -3.12      16      297

Best Double Couple:Mo=3.2*10**18
 NP1:Strike=340 Dip=69 Slip=  -2
 NP2:        71     88      -159

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.