USGS WPhase Moment Solution


11/04/07 13:11:24

Epicenter:  17.431  -93.978
MW 6.6

11/04/07 13:11:24.00
Centroid:   17.431  -93.778
Depth 167         No. of sta:177
Moment Tensor;   Scale 10**18 Nm
  Mrr=-4.67       Mtt=-0.40
  Mpp= 5.06       Mrt= 8.21
  Mrp=-4.09       Mtp=-4.62
 Principal axes:
  T  Val= 11.69  Plg=27  Azm= 50
  N     = -0.66      23      307
  P     =-11.03      52      182

Best Double Couple:Mo=1.1*10**19
 NP1:Strike=183 Dip=27 Slip= -31
 NP2:       301     76      -113

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 form 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