USGS Body-Wave Moment Tensor Solution


12/06/04 00:45:15.59

Epicenter:   5.286  -82.580
MW 6.2

Depth   4         No. of sta: 82
Moment Tensor;   Scale 10**18 Nm
  Mrr=-0.09       Mtt=-0.13
  Mpp= 0.22       Mrt= 1.50
  Mrp= 0.62       Mtp= 2.10
 Principal axes:
  T  Val=  2.90  Plg=27  Azm=317
  N       -0.57      55       92
  P       -2.33      21      215

Best Double Couple:Mo=2.7*10**18
 NP1:Strike=354 Dip=55 Slip= 175
 NP2:        87     86        35

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