USGS WPhase Moment Solution

SANTIAGO DEL ESTERO, ARGENTINA

13/02/22 12:01:58

Epicenter: -27.931  -63.138
MW 6.1

USGS/WPHASE CENTROID MOMENT TENSOR
13/02/22 12:01:58.00
Centroid:  -27.931  -63.025
Depth 580         No. of sta: 33
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.77       Mtt=-0.41
  Mpp= 1.18       Mrt=-0.76
  Mrp= 1.15       Mtp=-0.61
 Principal axes:
  T  Val=  2.03  Plg=25  Azm=247
  N     = -0.52      16      149
  P     = -1.51      58       30

Best Double Couple:Mo=1.8*10**18
 NP1:Strike= 10 Dip=24 Slip= -46
 NP2:       144     73      -107

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.