USGS Body-Wave Moment Tensor Solution

SANTIAGO DEL ESTERO, ARGENTINA

11/09/02 13:47:11.63

Epicenter: -28.430  -63.125
MW 6.7

USGS MOMENT TENSOR SOLUTION
Depth 589         No. of sta: 52
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.92       Mtt= 0.66
  Mpp= 0.26       Mrt=-0.26
  Mrp= 1.18       Mtp= 0.22
 Principal axes:
  T  Val=  1.00  Plg=30  Azm=280
  N        0.70      12      183
  P       -1.70      57       75

Best Double Couple:Mo=1.5*10**19
 NP1:Strike=180 Dip=76 Slip=-102
 NP2:        42     18       -50

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