USGS WPhase Moment Solution

MOLUCCA SEA

11/11/14  4: 5:12.00

Epicenter:  -0.953  126.864
MW 6.3

USGS/WPHASE CENTROID MOMENT TENSOR
11/11/14  4: 5:12.00
Centroid:   -0.953  126.864
Depth  19         No. of sta: 20
Moment Tensor;   Scale 10**18 Nm
  Mrr=-1.05       Mtt= 2.05
  Mpp=-1.00       Mrt=-1.12
  Mrp=-2.08       Mtp= 1.53
 Principal axes:
  T  Val=  3.50  Plg=23  Azm=150
  N     = -0.37      37       40
  P     = -3.13      43      264

Best Double Couple:Mo=3.3*10**18
 NP1:Strike=287 Dip=39 Slip= -18
 NP2:        32     78      -127

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.