USGS Body-Wave Moment Tensor Solution

NEAR ISLANDS, ALEUTIAN ISLANDS

12/11/15 11:22:22.59

Epicenter:  52.474  173.369
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth  26         No. of sta: 47
Moment Tensor;   Scale 10**17 Nm
  Mrr= 1.73       Mtt=-1.96
  Mpp= 0.23       Mrt= 0.98
  Mrp= 1.05       Mtp=-0.31
 Principal axes:
  T  Val=  2.39  Plg=64  Azm=293
  N       -0.06      20       70
  P       -2.34      16      166

Best Double Couple:Mo=2.4*10**17
 NP1:Strike= 60 Dip=64 Slip=  68
 NP2:       283     33       128

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