USGS Body-Wave Moment Tensor Solution
EASTERN NEW GUINEA REG., P.N.G.
12/04/17 07:13:50.06 Epicenter: -5.470 147.105 MW 6.8 USGS MOMENT TENSOR SOLUTION Depth 198 No. of sta: 44 Moment Tensor; Scale 10**19 Nm Mrr= 1.68 Mtt=-1.77 Mpp= 0.10 Mrt= 0.32 Mrp=-0.94 Mtp= 0.49 Principal axes: T Val= 2.12 Plg=65 Azm= 87 N -0.14 23 291 P -1.98 9 197 Best Double Couple:Mo=2.0*10**19 NP1:Strike=262 Dip=41 Slip= 54 NP2: 126 58 117
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.