USGS WPhase Moment Solution

JAN MAYEN ISLAND REGION

12/ 8/30 13:43:24.00

Epicenter:  71.461  -10.723
MW 6.8

USGS/WPHASE CENTROID MOMENT TENSOR
12/ 8/30 13:43:24.00
Centroid:   71.361  -10.408
Depth  13         No. of sta: 78
Moment Tensor;   Scale 10**19 Nm
  Mrr=-0.03       Mtt= 1.12
  Mpp=-1.09       Mrt= 0.16
  Mrp= 0.29       Mtp= 1.18
 Principal axes:
  T  Val=  1.67  Plg= 8  Azm=335
  N     = -0.04      78      197
  P     = -1.63       7       67

Best Double Couple:Mo=1.7*10**19
 NP1:Strike=112 Dip=78 Slip=   1
 NP2:        21     89       168

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.