USGS WPhase Moment Solution
MACQUARIE ISLAND REGION
12/06/22 4:31:17 Epicenter: -54.301 158.726 MW 5.7 USGS/WPHASE CENTROID MOMENT TENSOR 12/06/22 04:31:17.00 Centroid: -54.301 158.555 Depth 15 No. of sta: 19 Moment Tensor; Scale 10**17 Nm Mrr= 3.76 Mtt= 0.33 Mpp=-4.08 Mrt=-0.87 Mrp= 2.85 Mtp= 1.15 Principal axes: T Val= 4.74 Plg=71 Azm=249 N = 0.60 1 345 P = -5.33 18 75 Best Double Couple:Mo=5.1*10**17 NP1:Strike=169 Dip=27 Slip= 94 NP2: 344 63 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 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.
