USGS Body-Wave Moment Tensor Solution

BANDA SEA

12/10/08 11:43:35.69

Epicenter:  -4.457  129.115
MW 6.1

USGS MOMENT TENSOR SOLUTION
Depth  10         No. of sta: 23
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.52       Mtt=-0.86
  Mpp=-0.66       Mrt=-0.76
  Mrp=-0.24       Mtp= 0.82
 Principal axes:
  T  Val=  1.83  Plg=68  Azm=149
  N       -0.19      20      305
  P       -1.64       8       38

Best Double Couple:Mo=1.7*10**18
 NP1:Strike=291 Dip=56 Slip=  65
 NP2:       151     41       122

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