USGS Body-Wave Moment Tensor Solution

KEPULAUAN BATU, INDONESIA

12/10/03 13:32:34.92

Epicenter:  -0.447   97.667
MW 5.7

USGS MOMENT TENSOR SOLUTION
Depth   6         No. of sta: 45
Moment Tensor;   Scale 10**17 Nm
  Mrr= 3.19       Mtt=-1.47
  Mpp=-1.72       Mrt= 1.83
  Mrp=-3.10       Mtp= 0.72
 Principal axes:
  T  Val=  4.98  Plg=64  Azm= 62
  N       -0.89       3      326
  P       -4.08      26      235

Best Double Couple:Mo=4.6*10**17
 NP1:Strike=319 Dip=19 Slip=  82
 NP2:       147     71        93

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