USGS WPhase Moment Solution

SULAWESI, INDONESIA

12/12/17  9:16:28

Epicenter:  -0.708  123.837
MW 6.1

USGS/WPHASE CENTROID MOMENT TENSOR
12/12/17 09:16:28.00
Centroid:   -0.808  123.937
Depth  30         No. of sta: 13
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.27       Mtt= 1.56
  Mpp=-1.30       Mrt=-0.15
  Mrp= 0.75       Mtp= 0.35
 Principal axes:
  T  Val=  1.61  Plg= 2  Azm=173
  N     =  0.12      62      267
  P     = -1.73      27       82

Best Double Couple:Mo=1.7*10**18
 NP1:Strike=221 Dip=69 Slip=-161
 NP2:       125     73       -21

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.