USGS WPhase Moment Solution

12/05/29  7:00: 3

Epicenter:  44.813   11.078
MW 5.8

USGS/WPHASE CENTROID MOMENT TENSOR
12/05/29 07:00: 3.00
Centroid:   44.813   10.937
Depth  11         No. of sta: 19
Moment Tensor;   Scale 10**17 Nm
  Mrr= 5.58       Mtt=-5.03
  Mpp=-0.55       Mrt= 0.55
  Mrp= 0.92       Mtp= 0.98
 Principal axes:
  T  Val=  5.76  Plg=80  Azm=292
  N     = -0.51       9      101
  P     = -5.24       1      191

Best Double Couple:Mo=5.5*10**17
 NP1:Strike=291 Dip=44 Slip= 104
 NP2:        92     48        77

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

Details on the W-phase inversion algorithm.