USGS Body-Wave Moment Tensor Solution

SICHUAN-YUNNAN-GUIZHOU RG, CHINA

12/09/07 03:19:42.31

Epicenter:  27.507  103.933
MW 5.6

USGS MOMENT TENSOR SOLUTION
Depth   8         No. of sta: 15
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.03       Mtt= 0.60
  Mpp=-0.63       Mrt=-0.92
  Mrp= 0.82       Mtp=-3.17
 Principal axes:
  T  Val=  3.64  Plg=19  Azm=220
  N       -0.39      71       37
  P       -3.25       1      129

Best Double Couple:Mo=3.5*10**17
 NP1:Strike=263 Dip=76 Slip= 167
 NP2:       356     77        14

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