USGS WPhase Moment Solution

SULAWESI, INDONESIA

12/12/28 17:32:17.00

Epicenter:  -0.246  122.951
MW 5.5

USGS/WPHASE CENTROID MOMENT TENSOR
12/12/28 17:32:17.00
Centroid:   -0.346  122.951
Depth 120         No. of sta: 24
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.16       Mtt=-1.43
  Mpp= 0.27       Mrt= 1.72
  Mrp=-0.66       Mtp=-0.13
 Principal axes:
  T  Val=  2.23  Plg=58  Azm= 37
  N     =  0.07      14      282
  P     = -2.30      27      184

Best Double Couple:Mo=2.3*10**17
 NP1:Strike=243 Dip=22 Slip=  49
 NP2:       106     74       105

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.