USGS Body-Wave Moment Tensor Solution


13/03/03 05:41:20.10

Epicenter:  25.968   99.815
MW 5.2

Depth   8         No. of sta: 19
Moment Tensor;   Scale 10**16 Nm
  Mrr=-7.42       Mtt=-0.15
  Mpp= 7.57       Mrt= 1.56
  Mrp=-2.40       Mtp=-2.08
 Principal axes:
  T  Val=  8.56  Plg=10  Azm= 75
  N       -0.56       7      344
  P       -8.00      78      219

Best Double Couple:Mo=8.3*10**16
 NP1:Strike=173 Dip=36 Slip= -78
 NP2:       339     55       -98

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