USGS/SLU Regional Moment Solution


12/12/27 23:20:55.96

Epicenter:  38.197   21.943
MW 4.0

Depth  10         No. of sta: 17
Moment Tensor;   Scale 10**15 Nm
  Mrr=-0.84       Mtt= 0.85
  Mpp=-0.01       Mrt=-0.53
  Mrp= 0.52       Mtp=-0.64
 Principal axes:
  T  Val=  1.42  Plg=18  Azm=210
  N       -0.30      13      305
  P       -1.12      67       70

Best Double Couple:Mo=1.3*10**15
 NP1:Strike=131 Dip=64 Slip= -75
 NP2:       280     30      -118

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