USGS Body-Wave Moment Tensor Solution

WESTERN SICHUAN, CHINA

13/01/18 12:42:51.14

Epicenter:  31.071   99.575
MW 5.4

USGS MOMENT TENSOR SOLUTION
Depth   8         No. of sta: 20
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.26       Mtt= 1.60
  Mpp=-1.33       Mrt= 0.40
  Mrp= 0.34       Mtp= 0.34
 Principal axes:
  T  Val=  1.73  Plg=13  Azm=352
  N       -0.28      70      223
  P       -1.45      15       86

Best Double Couple:Mo=1.6*10**17
 NP1:Strike=219 Dip=89 Slip=-161
 NP2:       129     71        -2

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