USGS Body-Wave Moment Tensor Solution

BALLENY ISLANDS REGION

12/10/02 19:41:29.66

Epicenter: -65.000  177.927
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth  14         No. of sta: 9
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.06       Mtt= 2.17
  Mpp=-2.23       Mrt=-0.07
  Mrp=-0.26       Mtp=-0.87
 Principal axes:
  T  Val=  2.34  Plg= 1  Azm=191
  N        0.09      84       96
  P       -2.42       6      281

Best Double Couple:Mo=2.4*10**17
 NP1:Strike=326 Dip=85 Slip=  -4
 NP2:        56     86      -175

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