USGS Body-Wave Moment Tensor Solution


12/12/09 21:45:34.19

Epicenter:   6.710  126.183
MW 5.6

Depth  40         No. of sta: 24
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.52       Mtt=-0.33
  Mpp= 0.85       Mrt= 0.17
  Mrp= 2.10       Mtp=-1.52
 Principal axes:
  T  Val=  2.81  Plg=29  Azm=246
  N       -0.24      36      359
  P       -2.57      41      127

Best Double Couple:Mo=2.7*10**17
 NP1:Strike=184 Dip=83 Slip= -54
 NP2:       283     37      -169

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