USGS Body-Wave Moment Tensor Solution

SOUTHEASTERN ALASKA

13/01/31 09:53:39.00

Epicenter:  55.405 -134.915
MW 5.9

USGS MOMENT TENSOR SOLUTION
Depth  13         No. of sta: 59
Moment Tensor;   Scale 10**17 Nm
  Mrr=-0.69       Mtt= 3.20
  Mpp=-2.51       Mrt=-1.84
  Mrp=-1.77       Mtp= 7.05
 Principal axes:
  T  Val=  8.63  Plg=15  Azm=146
  N       -1.34      74      341
  P       -7.29       4      237

Best Double Couple:Mo=8.0*10**17
 NP1:Strike=282 Dip=76 Slip=   8
 NP2:       190     82       166

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