USGS Body-Wave Moment Tensor Solution
WEST OF MACQUARIE ISLAND
12/10/23 09:33:19.55 Epicenter: -57.567 148.055 MW 5.6 USGS MOMENT TENSOR SOLUTION Depth 9 No. of sta: 16 Moment Tensor; Scale 10**17 Nm Mrr= 0.24 Mtt= 1.69 Mpp=-1.93 Mrt= 0.45 Mrp=-1.01 Mtp=-2.63 Principal axes: T Val= 3.33 Plg=16 Azm= 29 N 0.12 70 174 P -3.45 11 296 Best Double Couple:Mo=3.4*10**17 NP1:Strike=163 Dip=86 Slip= 19 NP2: 72 71 176
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.