USGS WPhase Moment Solution

KURIL ISLANDS

12/11/16 18:12:39

Epicenter:  49.269  155.472
MW 6.5

USGS/WPHASE CENTROID MOMENT TENSOR
12/11/16 18:12:39.00
Centroid:   49.169  155.625
Depth  50         No. of sta:105
Moment Tensor;   Scale 10**18 Nm
  Mrr= 4.85       Mtt=-1.74
  Mpp=-3.11       Mrt= 2.08
  Mrp= 3.85       Mtp=-1.81
 Principal axes:
  T  Val=  6.61  Plg=68  Azm=295
  N     = -0.51       2       31
  P     = -6.10      21      122

Best Double Couple:Mo=6.4*10**18
 NP1:Strike=218 Dip=23 Slip=  97
 NP2:        30     67        87

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.