USGS WPhase Moment Solution


12/07/26  5:33:31

Epicenter: -17.593   66.363
MW 6.7

12/07/26 05:33:31.00
Centroid:  -17.893   66.048
Depth  30         No. of sta: 47
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.10       Mtt=-1.01
  Mpp= 1.11       Mrt=-0.40
  Mrp=-0.01       Mtp= 0.54
 Principal axes:
  T  Val=  1.25  Plg= 4  Azm=104
  N     =  0.02      71      207
  P     = -1.27      18       12

Best Double Couple:Mo=1.3*10**19
 NP1:Strike=150 Dip=74 Slip=-170
 NP2:        57     80       -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.