USGS WPhase Moment Solution

OFFSHORE BIO-BIO, CHILE

11/02/11 20:05:31

Epicenter: -36.479  -73.000
MW 6.9

USGS/WPHASE CENTROID MOMENT TENSOR
11/02/11 20:05:31.00
Centroid:  -36.479  -73.400
Depth  28         No. of sta: 12
Moment Tensor;   Scale 10**19 Nm
  Mrr= 0.86       Mtt= 0.04
  Mpp=-0.89       Mrt= 0.67
  Mrp=-3.02       Mtp=-0.27
 Principal axes:
  T  Val=  3.28  Plg=51  Azm= 70
  N     = -0.10       7      169
  P     = -3.17      37      265

Best Double Couple:Mo=3.2*10**19
 NP1:Strike= 36 Dip=11 Slip= 136
 NP2:       169     83        82

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