USGS Centroid Moment Solution

NORTHERN SUMATRA, INDONESIA

11/09/05 17:55:11.46

Epicenter:   2.996   97.986
MW 6.8

USGS CENTROID MOMENT TENSOR
11/09/05 17:55:24.70
Centroid:   2.545   97.848
Depth  50         No. of sta: 115
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.45       Mtt= 0.33
  Mpp= 0.12       Mrt= 1.27
  Mrp=-1.53       Mtp=-0.31
 Principal axes:
  T  Val=  2.08  Plg=38  Azm= 46
  N       -0.06       4      140
  P       -2.02      52      235

Best Double Couple:Mo=2.0*10**19
 NP1:Strike=107 Dip= 8 Slip=-122
 NP2:       320     83       -86

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