USGS Body-Wave Moment Tensor Solution

OFF THE COAST OF GUATEMALA

12/10/05 18:22:57.78

Epicenter:  13.032  -91.557
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth  60         No. of sta: 24
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.50       Mtt= 1.50
  Mpp=-2.00       Mrt= 0.88
  Mrp=-0.40       Mtp= 0.29
 Principal axes:
  T  Val=  2.02  Plg=30  Azm=359
  N        0.10      58      155
  P       -2.12      11      263

Best Double Couple:Mo=2.1*10**17
 NP1:Strike=134 Dip=77 Slip=  30
 NP2:        37     61       166

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