USGS Body-Wave Moment Tensor Solution

BALLENY ISLANDS REGION

12/10/09 12:32:10.14

Epicenter: -60.284  153.499
MW 6.3

USGS MOMENT TENSOR SOLUTION
Depth  15         No. of sta: 19
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.62       Mtt= 3.21
  Mpp=-3.83       Mrt=-1.07
  Mrp= 1.87       Mtp= 0.14
 Principal axes:
  T  Val=  3.64  Plg=22  Azm=185
  N        0.91      59      317
  P       -4.55      21       86

Best Double Couple:Mo=4.2*10**18
 NP1:Strike=316 Dip=89 Slip=  31
 NP2:       225     59       179

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