USGS Centroid Moment Solution


12/10/08 11:43:35.69

Epicenter:  -4.457  129.115
MW 6.2

12/10/08 11:43:45.70
Centroid:  -4.593  128.967
Depth  10         No. of sta: 71
Moment Tensor;   Scale 10**18 Nm
  Mrr= 2.21       Mtt=-1.51
  Mpp=-0.69       Mrt=-0.03
  Mrp=-0.25       Mtp= 1.15
 Principal axes:
  T  Val=  2.23  Plg=84  Azm=112
  N        0.09       6      305
  P       -2.32       1      215

Best Double Couple:Mo=2.3*10**18
 NP1:Strike=131 Dip=47 Slip=  98
 NP2:       299     44        81

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