USGS/SLU Regional Moment Solution

12/10/06 22:49:36.86

Epicenter: -32.097  -72.290
MW 4.1

USGS/SLU REGIONAL MOMENT TENSOR
Depth  18         No. of sta: 12
Moment Tensor;   Scale 10**15 Nm
  Mrr= 1.77       Mtt=-0.09
  Mpp=-1.67       Mrt=-0.05
  Mrp= 0.76       Mtp= 0.32
 Principal axes:
  T  Val=  1.92  Plg=78  Azm=272
  N       -0.04       2      170
  P       -1.89      12       80

Best Double Couple:Mo=1.9*10**15
 NP1:Strike=352 Dip=57 Slip=  93
 NP2:       167     33        86

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