USGS Body-Wave Moment Tensor Solution


11/11/08 02:59:07.60

Epicenter:  27.278  125.772
MW 6.9

Depth 227         No. of sta: 64
Moment Tensor;   Scale 10**19 Nm
  Mrr=-2.25       Mtt= 0.09
  Mpp= 2.17       Mrt=-0.78
  Mrp=-1.10       Mtp= 0.01
 Principal axes:
  T  Val=  2.44  Plg=14  Azm= 95
  N        0.28      14      188
  P       -2.72      70      321

Best Double Couple:Mo=2.6*10**19
 NP1:Strike=167 Dip=33 Slip=-115
 NP2:        16     60       -74

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