USGS WPhase Moment Solution
SOUTHEAST OF LOYALTY ISLANDS
12/10/23 9:39:31.00 Epicenter: -22.316 171.675 MW 5.8 USGS/WPHASE CENTROID MOMENT TENSOR 12/10/23 9:39:31.00 Centroid: -22.216 171.459 Depth 100 No. of sta: 25 Moment Tensor; Scale 10**17 Nm Mrr= 1.19 Mtt=-3.32 Mpp= 2.13 Mrt= 4.22 Mrp= 3.63 Mtp= 3.22 Principal axes: T Val= 7.79 Plg=39 Azm=303 N = -1.80 39 75 P = -5.99 26 189 Best Double Couple:Mo=7.1*10**17 NP1:Strike=330 Dip=41 Slip= 168 NP2: 69 82 50
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.
