USGS Body-Wave Moment Tensor Solution


12/12/10 16:53:09.15

Epicenter:  -6.540  129.815
MW 7.1

Depth 156         No. of sta: 42
Moment Tensor;   Scale 10**19 Nm
  Mrr= 1.13       Mtt=-4.19
  Mpp= 3.06       Mrt= 2.65
  Mrp= 3.47       Mtp=-0.34
 Principal axes:
  T  Val=  5.89  Plg=39  Azm=281
  N       -0.25      39       52
  P       -5.64      27      166

Best Double Couple:Mo=5.8*10**19
 NP1:Strike= 46 Dip=83 Slip=  51
 NP2:       307     40       168

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