USGS Body-Wave Moment Tensor Solution

CENTRAL EAST PACIFIC RISE

12/09/06 23:33:06.68

Epicenter:  -4.555 -105.864
MW 5.7

USGS MOMENT TENSOR SOLUTION
Depth   8         No. of sta: 25
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.62       Mtt=-0.43
  Mpp=-0.19       Mrt= 0.49
  Mrp= 0.58       Mtp= 4.50
 Principal axes:
  T  Val=  4.35  Plg=11  Azm=314
  N        0.46      79      137
  P       -4.81       1       44

Best Double Couple:Mo=4.6*10**17
 NP1:Strike= 90 Dip=82 Slip=   8
 NP2:       359     82       171

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