USGS Body-Wave Moment Tensor Solution


13/05/06 07:33:06.17

Epicenter: -21.115 -176.158
MW 5.5

Depth   4         No. of sta: 34
Moment Tensor;   Scale 10**17 Nm
  Mrr= 2.21       Mtt=-1.65
  Mpp=-0.56       Mrt=-1.20
  Mrp= 0.02       Mtp= 0.43
 Principal axes:
  T  Val=  2.55  Plg=74  Azm=173
  N       -0.44       6      284
  P       -2.11      15       16

Best Double Couple:Mo=2.4*10**17
 NP1:Strike=281 Dip=60 Slip=  83
 NP2:       114     30       102

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