USGS WPhase Moment Solution

BANDA SEA

12/11/28  8:56:17.00

Epicenter:  -5.404  131.112
MW 5.6

USGS/WPHASE CENTROID MOMENT TENSOR
12/11/28  8:56:17.00
Centroid:   -5.304  131.112
Depth  70         No. of sta: 26
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.97       Mtt=-3.06
  Mpp= 1.09       Mrt= 1.00
  Mrp= 1.50       Mtp=-1.23
 Principal axes:
  T  Val=  3.09  Plg=53  Azm=271
  N     =  0.64      32       62
  P     = -3.73      14      161

Best Double Couple:Mo=3.5*10**17
 NP1:Strike=287 Dip=42 Slip= 144
 NP2:        46     67        54

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.