USGS Body-Wave Moment Tensor Solution

OFF COAST OF CENTRAL AMERICA

13/03/10 10:18:17.92

Epicenter:  12.809  -90.694
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth   5         No. of sta: 27
Moment Tensor;   Scale 10**17 Nm
  Mrr=-1.36       Mtt= 1.13
  Mpp= 0.24       Mrt= 1.08
  Mrp=-1.55       Mtp=-0.47
 Principal axes:
  T  Val=  2.17  Plg=27  Azm= 37
  N        0.28      13      134
  P       -2.44      60      247

Best Double Couple:Mo=2.3*10**17
 NP1:Strike= 98 Dip=21 Slip=-128
 NP2:       318     73       -77

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