USGS WPhase Moment Solution


13/01/28 16:38:53

Epicenter:  42.603   79.695
MW 6.1

13/01/28 16:38:53.00
Centroid:   42.703   79.831
Depth  30         No. of sta: 34
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.07       Mtt=-1.40
  Mpp= 1.47       Mrt=-0.43
  Mrp=-0.24       Mtp= 0.84
 Principal axes:
  T  Val=  1.76  Plg=10  Azm=106
  N     = -0.06      73      236
  P     = -1.71      12       13

Best Double Couple:Mo=1.7*10**18
 NP1:Strike=150 Dip=73 Slip=-178
 NP2:        60     89       -16

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.