USGS/SLU Regional Moment Solution

ANTIGUA AND BARBUDA REGION

13/04/30 06:56:47.58

Epicenter:  17.517  -62.115
MW 5.3

USGS/SLU REGIONAL MOMENT TENSOR
Depth  52         No. of sta: 38
Moment Tensor;   Scale 10**16 Nm
  Mrr= 5.62       Mtt= 1.12
  Mpp=-6.74       Mrt=-4.57
  Mrp= 5.73       Mtp= 0.80
 Principal axes:
  T  Val=  9.75  Plg=59  Azm=213
  N       -0.17      18      337
  P       -9.58      24       75

Best Double Couple:Mo=9.7*10**16
 NP1:Strike=330 Dip=71 Slip=  71
 NP2:       197     27       134

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