USGS WPhase Moment Solution

SALTA, ARGENTINA

12/11/22 13: 7:5.00

Epicenter: -22.665  -63.488
MW 5.9

USGS/WPHASE CENTROID MOMENT TENSOR
12/11/22 13: 7: 5.00
Centroid:  -22.665  -63.704
Depth 510         No. of sta: 31
Moment Tensor;   Scale 10**17 Nm
  Mrr=-2.83       Mtt= 0.13
  Mpp= 2.71       Mrt=-2.25
  Mrp= 6.09       Mtp= 4.98
 Principal axes:
  T  Val=  8.00  Plg=22  Azm=296
  N     =  1.16      37      188
  P     = -9.16      43       49

Best Double Couple:Mo=8.6*10**17
 NP1:Strike= 72 Dip=41 Slip= -20
 NP2:       178     77      -128

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.