USGS Body-Wave Moment Tensor Solution
E. RUSSIA-N.E. CHINA BORDER REG.
13/04/06 00:29:55.98 Epicenter: 42.756 131.054 MW 5.9 USGS MOMENT TENSOR SOLUTION Depth 570 No. of sta: 60 Moment Tensor; Scale 10**17 Nm Mrr= 3.39 Mtt=-2.05 Mpp=-1.34 Mrt= 0.97 Mrp=-6.68 Mtp= 1.71 Principal axes: T Val= 8.11 Plg=55 Azm= 92 N -1.26 13 342 P -6.86 32 244 Best Double Couple:Mo=7.6*10**17 NP1:Strike=294 Dip=18 Slip= 41 NP2: 165 78 104
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.