USGS Body-Wave Moment Tensor Solution


12/09/11 01:28:19.43

Epicenter:  45.290  151.215
MW 5.5

Depth  16         No. of sta: 73
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.88       Mtt=-0.45
  Mpp=-0.43       Mrt= 0.76
  Mrp= 1.33       Mtp=-0.78
 Principal axes:
  T  Val=  1.74  Plg=60  Azm=285
  N        0.26      11       34
  P       -2.00      28      130

Best Double Couple:Mo=1.9*10**17
 NP1:Strike= 31 Dip=74 Slip=  79
 NP2:       246     20       124

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