USGS Body-Wave Moment Tensor Solution


12/12/11 06:18:27.65

Epicenter:   0.574  126.262
MW 5.9

Depth  48         No. of sta: 44
Moment Tensor;   Scale 10**17 Nm
  Mrr= 6.06       Mtt=-0.49
  Mpp=-5.57       Mrt= 1.27
  Mrp=-3.91       Mtp=-4.89
 Principal axes:
  T  Val=  8.19  Plg=60  Azm= 48
  N        0.86      27      203
  P       -9.05      11      298

Best Double Couple:Mo=8.7*10**17
 NP1:Strike= 58 Dip=42 Slip= 133
 NP2:       186     61        58

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