USGS Centroid Moment Solution


13/09/07 00:13:29.86

Epicenter:  14.644  -92.104
MW 6.4

13/09/07 00:13:54.40
Centroid:  14.573  -91.533
Depth  89         No. of sta:112
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.00       Mtt=-1.31
  Mpp= 1.31       Mrt= 3.16
  Mrp=-2.54       Mtp=-0.29
 Principal axes:
  T  Val=  4.27  Plg=42  Azm= 56
  N        0.00      18      309
  P       -4.27      42      201

Best Double Couple:Mo=4.3*10**18
 NP1:Strike=309 Dip=90 Slip=-108
 NP2:       219     18        -0

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