USGS/SLU Regional Moment Solution


12/11/12 23:18:42.63

Epicenter:  42.587   19.018
MW 4.4

Depth  25         No. of sta: 19
Moment Tensor;   Scale 10**15 Nm
  Mrr= 5.70       Mtt=-4.76
  Mpp=-0.93       Mrt= 0.63
  Mrp=-1.20       Mtp= 2.13
 Principal axes:
  T  Val=  5.91  Plg=80  Azm= 81
  N       -0.10       8      296
  P       -5.81       5      205

Best Double Couple:Mo=5.9*10**15
 NP1:Strike=286 Dip=40 Slip=  78
 NP2:       122     51       100

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