USGS WPhase Moment Solution


13/ 2/26 19:57:55.00

Epicenter: -21.442 -179.318
MW 5.7

13/ 2/26 19:57:55.00
Centroid:  -21.442 -179.318
Depth 630         No. of sta: 14
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.45       Mtt=-3.34
  Mpp= 2.90       Mrt=-1.36
  Mrp= 0.09       Mtp= 3.67
 Principal axes:
  T  Val=  4.65  Plg= 6  Azm=115
  N     =  0.67      75      234
  P     = -5.32      12       24

Best Double Couple:Mo=5.0*10**17
 NP1:Strike=160 Dip=76 Slip=-176
 NP2:        69     86       -13

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.