USGS Body-Wave Moment Tensor Solution


13/03/07 03:36:46.70

Epicenter:  24.275  121.446
MW 5.5

Depth   8         No. of sta: 22
Moment Tensor;   Scale 10**17 Nm
  Mrr=-1.80       Mtt= 0.15
  Mpp= 1.65       Mrt= 0.65
  Mrp= 0.69       Mtp=-0.76
 Principal axes:
  T  Val=  2.01  Plg= 6  Azm=250
  N        0.20      23      342
  P       -2.21      67      145

Best Double Couple:Mo=2.1*10**17
 NP1:Strike=179 Dip=55 Slip= -62
 NP2:       316     43      -124

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