USGS Body-Wave Moment Tensor Solution


12/04/14 22:05:26.99

Epicenter: -18.990  168.739
MW 6.2

Depth  13         No. of sta: 51
Moment Tensor;   Scale 10**18 Nm
  Mrr=-1.35       Mtt= 2.20
  Mpp=-0.85       Mrt= 0.53
  Mrp= 1.09       Mtp= 0.17
 Principal axes:
  T  Val=  2.31  Plg=10  Azm=353
  N       -0.07      36      256
  P       -2.24      52       97

Best Double Couple:Mo=2.3*10**18
 NP1:Strike=119 Dip=47 Slip= -36
 NP2:       235     64      -131

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