USGS/SLU Regional Moment Solution


12/12/11 10:32:03.92

Epicenter:  24.006  121.665
MW 4.4

Depth  34         No. of sta: 12
Moment Tensor;   Scale 10**15 Nm
  Mrr= 1.69       Mtt=-2.04
  Mpp= 0.36       Mrt= 0.53
  Mrp= 2.07       Mtp=-3.20
 Principal axes:
  T  Val=  3.72  Plg=39  Azm=245
  N        0.97      47       36
  P       -4.69      15      142

Best Double Couple:Mo=4.3*10**15
 NP1:Strike= 19 Dip=75 Slip=  40
 NP2:       276     51       160

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