USGS Body-Wave Moment Tensor Solution

E. RUSSIA-N.E. CHINA BORDER REG.

13/04/05 13:00:02.77

Epicenter:  42.719  131.090
MW 6.4

USGS MOMENT TENSOR SOLUTION
Depth 570         No. of sta:110
Moment Tensor;   Scale 10**18 Nm
  Mrr= 0.88       Mtt=-0.78
  Mpp=-0.10       Mrt= 0.26
  Mrp=-4.15       Mtp= 0.75
 Principal axes:
  T  Val=  4.59  Plg=48  Azm= 95
  N       -0.63      11      352
  P       -3.96      40      253

Best Double Couple:Mo=4.3*10**18
 NP1:Strike=283 Dip=12 Slip=  20
 NP2:       173     86       101

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