USGS/SLU Regional Moment Solution


12/11/10 21:30:00.93

Epicenter:  37.929   20.851
MW 4.2

Depth  17         No. of sta: 21
Moment Tensor;   Scale 10**15 Nm
  Mrr=-0.35       Mtt= 2.45
  Mpp=-2.10       Mrt= 0.03
  Mrp=-0.92       Mtp=-0.14
 Principal axes:
  T  Val=  2.45  Plg= 1  Azm=  2
  N        0.04      67       95
  P       -2.49      23      271

Best Double Couple:Mo=2.5*10**15
 NP1:Strike= 49 Dip=73 Slip=-164
 NP2:       314     75       -18

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