USGS Body-Wave Moment Tensor Solution
11/03/17 02:47:59.59 VANUATU Epicenter: -17.339 167.743 MW 6.1 USGS MOMENT TENSOR SOLUTION Depth 14 No. of sta: 52 Moment Tensor; Scale 10**18 Nm Mrr= 1.55 Mtt= 0.11 Mpp=-1.66 Mrt= 0.21 Mrp=-0.83 Mtp= 0.36 Principal axes: T Val= 1.76 Plg=76 Azm= 72 N 0.18 1 168 P -1.94 14 259 Best Double Couple:Mo=1.9*10**18 NP1:Strike=351 Dip=31 Slip= 93 NP2: 167 59 88
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 form 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.