USGS Body-Wave Moment Tensor Solution


13/04/11 15:28:30.74

Epicenter: -17.349  175.050
MW 5.5

Depth  11         No. of sta: 23
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.05       Mtt= 0.02
  Mpp=-0.06       Mrt= 0.46
  Mrp= 0.24       Mtp= 2.33
 Principal axes:
  T  Val=  2.41  Plg=12  Azm=316
  N       -0.05      78      118
  P       -2.36       4      225

Best Double Couple:Mo=2.4*10**17
 NP1:Strike=360 Dip=79 Slip= 174
 NP2:        91     84        11

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