USGS/SLU Regional Moment Solution

VIRGIN ISLANDS REGION

13/01/10 16:33:36.92

Epicenter:  19.523  -64.458
MW 5.0

USGS/SLU REGIONAL MOMENT TENSOR
Depth   9         No. of sta: 24
Moment Tensor;   Scale 10**16 Nm
  Mrr= 2.77       Mtt=-1.51
  Mpp=-1.26       Mrt= 0.69
  Mrp= 0.50       Mtp= 2.79
 Principal axes:
  T  Val=  3.17  Plg=64  Azm=316
  N        1.01      25      133
  P       -4.19       1      224

Best Double Couple:Mo=3.8*10**16
 NP1:Strike=111 Dip=51 Slip=  57
 NP2:       337     49       125

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