USGS Body-Wave Moment Tensor Solution


13/02/26 19:57:54.50

Epicenter: -21.461 -179.299
MW 5.7

Depth 608         No. of sta: 31
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.33       Mtt=-2.99
  Mpp= 2.66       Mrt=-2.02
  Mrp= 0.53       Mtp= 2.59
 Principal axes:
  T  Val=  3.69  Plg= 5  Azm=113
  N        1.14      67      215
  P       -4.84      22       21

Best Double Couple:Mo=4.4*10**17
 NP1:Strike= 65 Dip=78 Slip= -19
 NP2:       159     71      -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