USGS WPhase Moment Solution

SANTA CRUZ ISLANDS

13/ 2/ 6  0: 7:22.00

Epicenter: -10.857  165.206
MW 6.0

USGS/WPHASE CENTROID MOMENT TENSOR
13/ 2/ 6  0: 7:22.00
Centroid:  -11.157  165.206
Depth  13         No. of sta: 25
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.49       Mtt= 0.64
  Mpp=-1.13       Mrt= 0.44
  Mrp= 0.15       Mtp= 0.58
 Principal axes:
  T  Val=  1.14  Plg=35  Azm=343
  N     =  0.16      54      164
  P     = -1.30       0       73

Best Double Couple:Mo=1.2*10**18
 NP1:Strike=124 Dip=65 Slip=  26
 NP2:        23     66       153

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.