USGS WPhase Moment Solution


12/11/14  5:21:43

Epicenter:   9.991  122.430
MW 5.7

12/11/14 05:21:43.00
Centroid:    9.991  122.430
Depth  30         No. of sta: 20
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.48       Mtt=-0.10
  Mpp=-2.38       Mrt=-1.42
  Mrp=-4.29       Mtp= 0.10
 Principal axes:
  T  Val=  5.29  Plg=57  Azm=115
  N     = -0.32       7       13
  P     = -4.97      30      278

Best Double Couple:Mo=5.1*10**17
 NP1:Strike=345 Dip=16 Slip=  60
 NP2:       195     76        98

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.