USGS/SLU Regional Moment Solution

KODIAK ISLAND REGION, ALASKA

 12/09/18 01:44:49   
 KODIAK ISLAND REGION, ALASKA    
 Epicenter:  56.880 -154.080
 MW 5.1

 USGS/SLU REGIONAL MOMENT TENSOR
 Depth  42         No. of sta: 31
 Moment Tensor;   Scale 10**16 Nm
   Mrr=-0.40       Mtt=-4.23
   Mpp= 4.62       Mrt=-1.86
   Mrp= 1.86       Mtp= 0.98
  Principal axes:
   T  Val=  5.25  Plg=18  Azm=272
   N        0.00      60      150
   P       -5.25      24       10

 Best Double Couple:Mo=5.3*10**16
  NP1:Strike=142 Dip=86 Slip=-150
  NP2:        50     60        -5
                                      
                                      

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