USGS/SLU Regional Moment Solution

12/12/31 11:38:27.49

Epicenter:  61.654 -141.065
MW 4.0

USGS/SLU REGIONAL MOMENT TENSOR
Depth  16         No. of sta: 23
Moment Tensor;   Scale 10**15 Nm
  Mrr= 0.38       Mtt=-0.84
  Mpp= 0.46       Mrt=-1.14
  Mrp=-0.54       Mtp= 0.29
 Principal axes:
  T  Val=  1.45  Plg=47  Azm=129
  N        0.08      26      251
  P       -1.52      31      359

Best Double Couple:Mo=1.5*10**15
 NP1:Strike=247 Dip=81 Slip=  63
 NP2:       140     28       161

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