USGS/SLU Regional Moment Solution

OFF COAST OF JALISCO, MEXICO

12/10/01 17:32:31.00

Epicenter:  18.700 -107.151
MW 5.2

USGS/SLU REGIONAL MOMENT TENSOR
Depth   9         No. of sta: 8
Moment Tensor;   Scale 10**16 Nm
  Mrr=-1.46       Mtt=-3.27
  Mpp= 4.72       Mrt= 1.58
  Mrp= 1.03       Mtp=-4.93
 Principal axes:
  T  Val=  7.08  Plg= 2  Azm=245
  N       -0.75      69      339
  P       -6.33      21      154

Best Double Couple:Mo=6.7*10**16
 NP1:Strike=198 Dip=77 Slip= -16
 NP2:       291     74      -166

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