USGS Body-Wave Moment Tensor Solution

COSTA RICA

12/10/10 12:19:46.76

Epicenter:  10.219  -85.373
MW 5.3

USGS MOMENT TENSOR SOLUTION
Depth  16         No. of sta: 42
Moment Tensor;   Scale 10**16 Nm
  Mrr= 8.35       Mtt=-2.84
  Mpp=-5.51       Mrt= 4.17
  Mrp=-3.71       Mtp= 3.58
 Principal axes:
  T  Val= 10.14  Plg=72  Azm= 33
  N       -0.48       6      141
  P       -9.65      17      233

Best Double Couple:Mo=9.9*10**16
 NP1:Strike=332 Dip=29 Slip= 102
 NP2:       138     62        83

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