USGS WPhase Moment Solution


12/03/25 22:37: 6

Epicenter: -35.197  -71.783
MW 7.1

12/03/25 22:37: 6.00
Centroid:  -35.197  -72.027
Depth  40         No. of sta: 37
Moment Tensor;   Scale 10**19 Nm
  Mrr= 2.77       Mtt= 0.05
  Mpp=-2.82       Mrt= 0.13
  Mrp=-4.15       Mtp=-0.52
 Principal axes:
  T  Val=  5.00  Plg=61  Azm= 81
  N     =  0.05       5      181
  P     = -5.05      27      275

Best Double Couple:Mo=5.0*10**19
 NP1:Strike= 20 Dip=18 Slip= 109
 NP2:       180     73        84

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.