USGS/SLU Regional Moment Solution

13/08/27 00:51:43.81

Epicenter:  39.669 -119.684
MW 4.2

USGS/SLU REGIONAL MOMENT TENSOR
Depth  11         No. of sta: 43
Moment Tensor;   Scale 10**15 Nm
  Mrr= 0.17       Mtt=-2.20
  Mpp= 2.03       Mrt=-0.13
  Mrp= 0.24       Mtp=-0.02
 Principal axes:
  T  Val=  2.06  Plg= 7  Azm=270
  N        0.14      82      112
  P       -2.21       3      360

Best Double Couple:Mo=2.1*10**15
 NP1:Strike= 45 Dip=83 Slip=   3
 NP2:       315     87       173

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