USGS WPhase Moment Solution


12/12/22 16:41:44

Epicenter:  22.430   94.753
MW 5.5

12/12/22 16:41:44.00
Centroid:   22.230   94.644
Depth 130         No. of sta: 21
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.76       Mtt=-0.94
  Mpp= 0.18       Mrt=-1.69
  Mrp=-0.57       Mtp= 0.61
 Principal axes:
  T  Val=  2.14  Plg=50  Azm=142
  N     = -0.13      22      263
  P     = -2.01      30        7

Best Double Couple:Mo=2.1*10**17
 NP1:Strike=144 Dip=25 Slip= 153
 NP2:       259     79        67

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.