USGS Centroid Moment Solution

SANTIAGO DEL ESTERO, ARGENTINA

11/09/02 13:47:11.63

Epicenter: -28.430  -63.125
MW 6.7

USGS CENTROID MOMENT TENSOR
11/09/02 13:47:22.40
Centroid: -28.504  -63.449
Depth 594         No. of sta: 42
Moment Tensor;   Scale 10**19 Nm
  Mrr=-1.20       Mtt= 0.44
  Mpp= 0.76       Mrt=-0.23
  Mrp= 1.00       Mtp= 0.19
 Principal axes:
  T  Val=  1.19  Plg=22  Azm=277
  N        0.47      10      183
  P       -1.66      66       71

Best Double Couple:Mo=1.4*10**19
 NP1:Strike= 25 Dip=25 Slip= -66
 NP2:       179     68      -101

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