USGS Body-Wave Moment Tensor Solution
13/01/28 16:38:53.51 Epicenter: 42.598 79.699 MW 6.0 USGS MOMENT TENSOR SOLUTION Depth 14 No. of sta: 53 Moment Tensor; Scale 10**18 Nm Mrr= 0.02 Mtt=-1.34 Mpp= 1.32 Mrt=-0.03 Mrp=-0.07 Mtp= 0.63 Principal axes: T Val= 1.46 Plg= 3 Azm=103 N 0.02 87 271 P -1.48 1 13 Best Double Couple:Mo=1.5*10**18 NP1:Strike=238 Dip=88 Slip= 2 NP2: 148 88 178
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.