USGS WPhase Moment Solution

NORTHEASTERN SAKHA, RUSSIA

13/02/14 13:13:53

Epicenter:  67.613  142.600
MW 6.6

USGS/WPHASE CENTROID MOMENT TENSOR
13/02/14 13:13:53.00
Centroid:   67.913  141.833
Depth  15         No. of sta:109
Moment Tensor;   Scale 10**18 Nm
  Mrr= 9.43       Mtt=-5.53
  Mpp=-3.90       Mrt= 0.41
  Mrp= 3.38       Mtp= 5.63
 Principal axes:
  T  Val= 10.45  Plg=72  Azm=293
  N     =  0.14      16      133
  P     =-10.59       5       42

Best Double Couple:Mo=1.1*10**19
 NP1:Strike=115 Dip=42 Slip=  65
 NP2:       327     53       111

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.