USGS Body-Wave Moment Tensor Solution
12/06/17 03:43:08.28 Epicenter: -8.440 160.446 MW 5.6 USGS MOMENT TENSOR SOLUTION Depth 39 No. of sta: 35 Moment Tensor; Scale 10**17 Nm Mrr=-3.74 Mtt= 2.45 Mpp= 1.29 Mrt=-1.16 Mrp= 0.04 Mtp=-1.00 Principal axes: T Val= 3.18 Plg= 9 Azm=208 N 0.78 6 117 P -3.95 79 352 Best Double Couple:Mo=3.6*10**17 NP1:Strike=113 Dip=54 Slip= -98 NP2: 305 37 -80
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.