USGS/SLU Regional Moment Solution

13/02/13 17:05:15.18

Epicenter:  38.032 -118.052
MW 3.7

USGS/SLU REGIONAL MOMENT TENSOR
Depth  11         No. of sta: 57
Moment Tensor;   Scale 10**14 Nm
  Mrr=-1.00       Mtt=-1.73
  Mpp= 2.74       Mrt= 1.82
  Mrp=-1.05       Mtp= 3.14
 Principal axes:
  T  Val=  4.36  Plg= 1  Azm=117
  N        0.23      60       25
  P       -4.59      30      208

Best Double Couple:Mo=4.5*10**14
 NP1:Strike=346 Dip=70 Slip=-157
 NP2:       248     68       -22

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