USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

13/02/02 18:58:06.70

Epicenter: -10.922  165.246
MW 6.0

USGS MOMENT TENSOR SOLUTION
Depth   6         No. of sta: 20
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.56       Mtt= 0.45
  Mpp=-1.01       Mrt= 0.77
  Mrp=-0.82       Mtp= 0.09
 Principal axes:
  T  Val=  1.41  Plg=50  Azm= 22
  N        0.04      28      151
  P       -1.45      26      256

Best Double Couple:Mo=1.4*10**18
 NP1:Strike= 30 Dip=31 Slip= 153
 NP2:       144     77        62

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