USGS Body-Wave Moment Tensor Solution


12/11/11 18:19:42.59

Epicenter:  23.158   95.971
MW 5.5

Depth   8         No. of sta: 31
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.04       Mtt=-0.03
  Mpp= 0.07       Mrt= 0.58
  Mrp= 0.21       Mtp= 1.81
 Principal axes:
  T  Val=  1.99  Plg=16  Azm=315
  N       -0.15      72      104
  P       -1.84       9      223

Best Double Couple:Mo=1.9*10**17
 NP1:Strike=358 Dip=73 Slip= 175
 NP2:        90     85        17

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