USGS WPhase Moment Solution

BULGARIA

12/05/22  0:00:33

Epicenter:  42.682   23.017
MW 5.5

USGS/WPHASE CENTROID MOMENT TENSOR
12/05/22 00:00:33.00
Centroid:   42.682   23.017
Depth  12         No. of sta: 41
Moment Tensor;   Scale 10**17 Nm
  Mrr=-2.49       Mtt= 1.90
  Mpp= 0.59       Mrt=-0.16
  Mrp= 0.55       Mtp=-1.28
 Principal axes:
  T  Val=  2.71  Plg= 4  Azm=212
  N     = -0.13       9      302
  P     = -2.58      79       95

Best Double Couple:Mo=2.7*10**17
 NP1:Strike=292 Dip=41 Slip=-104
 NP2:       130     50       -78

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.