USGS Body-Wave Moment Tensor Solution

BOUGAINVILLE REGION, P.N.G.

13/04/14 01:32:24.30

Epicenter:  -6.512  154.595
MW 6.4

USGS MOMENT TENSOR SOLUTION
Depth  31         No. of sta: 62
Moment Tensor;   Scale 10**18 Nm
  Mrr= 3.92       Mtt=-0.39
  Mpp=-3.53       Mrt= 1.41
  Mrp=-1.55       Mtp= 2.97
 Principal axes:
  T  Val=  4.41  Plg=76  Azm= 26
  N        1.34       7      147
  P       -5.75      12      238

Best Double Couple:Mo=5.2*10**18
 NP1:Strike=338 Dip=34 Slip= 103
 NP2:       142     57        81

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