USGS Body-Wave Moment Tensor Solution


13/01/13 16:28:26.18

Epicenter:  25.916 -110.157
MW 5.5

Depth   6         No. of sta: 34
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.04       Mtt=-2.22
  Mpp= 2.17       Mrt=-0.14
  Mrp=-1.24       Mtp=-0.32
 Principal axes:
  T  Val=  2.76  Plg=24  Azm= 87
  N       -0.49      65      250
  P       -2.27       7      354

Best Double Couple:Mo=2.5*10**17
 NP1:Strike=223 Dip=78 Slip=  23
 NP2:       128     68       167

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