USGS/SLU Regional Moment Solution

13/02/13 22:20:16.22

Epicenter:  38.048 -118.082
MW 3.7

USGS/SLU REGIONAL MOMENT TENSOR
Depth  12         No. of sta: 38
Moment Tensor;   Scale 10**14 Nm
  Mrr=-3.16       Mtt=-0.11
  Mpp= 3.28       Mrt= 1.87
  Mrp=-0.98       Mtp= 2.51
 Principal axes:
  T  Val=  4.61  Plg= 0  Azm=298
  N       -0.03      34       28
  P       -4.59      56      208

Best Double Couple:Mo=4.6*10**14
 NP1:Strike=359 Dip=54 Slip=-134
 NP2:       237     54       -46

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