USGS Centroid Moment Solution


12/10/08 11:43:35.30

Epicenter:  -4.515  129.081
MW 6.2

12/10/08 11:43:44.59
Centroid:  -4.674  129.021
Depth  21         No. of sta: 92
Moment Tensor;   Scale 10**18 Nm
  Mrr= 2.74       Mtt=-1.84
  Mpp=-0.91       Mrt=-0.57
  Mrp= 1.03       Mtp= 1.25
 Principal axes:
  T  Val=  3.02  Plg=76  Azm=258
  N       -0.12       9      128
  P       -2.90      11       37

Best Double Couple:Mo=3.0*10**18
 NP1:Strike=116 Dip=35 Slip=  74
 NP2:       315     56       101

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