USGS Body-Wave Moment Tensor Solution
12/06/16 22:18:48.64 Epicenter: 15.598 119.587 MW 5.8 USGS MOMENT TENSOR SOLUTION Depth 25 No. of sta: 44 Moment Tensor; Scale 10**17 Nm Mrr= 5.78 Mtt=-1.02 Mpp=-4.76 Mrt= 0.42 Mrp=-0.80 Mtp= 1.72 Principal axes: T Val= 5.85 Plg=85 Azm= 57 N -0.35 1 159 P -5.50 5 249 Best Double Couple:Mo=5.7*10**17 NP1:Strike=340 Dip=40 Slip= 91 NP2: 158 50 89
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.