USGS Body-Wave Moment Tensor Solution


13/01/09 01:41:53.22

Epicenter:  25.327   95.038
MW 5.8

Depth  89         No. of sta: 59
Moment Tensor;   Scale 10**17 Nm
  Mrr= 6.47       Mtt=-4.81
  Mpp=-1.67       Mrt= 0.82
  Mrp=-2.55       Mtp= 2.75
 Principal axes:
  T  Val=  7.21  Plg=74  Azm= 89
  N       -0.49      13      305
  P       -6.72       9      213

Best Double Couple:Mo=7.0*10**17
 NP1:Strike=287 Dip=38 Slip=  68
 NP2:       134     55       106

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