USGS WPhase Moment Solution

AEGEAN SEA

13/01/08 14:16: 9

Epicenter:  39.659   25.567
MW 5.7

USGS/WPHASE CENTROID MOMENT TENSOR
13/01/08 14:16: 9.00
Centroid:   39.559   25.567
Depth  11         No. of sta: 24
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.23       Mtt= 3.78
  Mpp=-4.01       Mrt= 1.63
  Mrp= 0.57       Mtp=-2.01
 Principal axes:
  T  Val=  4.74  Plg=18  Azm= 11
  N     = -0.06      68      225
  P     = -4.68      11      105

Best Double Couple:Mo=4.7*10**17
 NP1:Strike=150 Dip=69 Slip=   5
 NP2:        58     85       159

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.