USGS Body-Wave Moment Tensor Solution


13/02/15 19:55:31.72

Epicenter: -17.699 -178.838
MW 5.4

Depth 550         No. of sta: 12
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.07       Mtt= 0.95
  Mpp=-0.88       Mrt= 0.85
  Mrp=-0.16       Mtp= 0.65
 Principal axes:
  T  Val=  1.54  Plg=26  Azm=347
  N       -0.27      54      119
  P       -1.26      23      245

Best Double Couple:Mo=1.4*10**17
 NP1:Strike= 25 Dip=54 Slip= 177
 NP2:       116     88        36

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