USGS Body-Wave Moment Tensor Solution
SOUTHEAST OF LOYALTY ISLANDS
13/08/21 04:43:18.36 Epicenter: -22.282 171.714 MW 5.7 USGS MOMENT TENSOR SOLUTION Depth 92 No. of sta: 37 Moment Tensor; Scale 10**17 Nm Mrr= 1.45 Mtt=-1.23 Mpp=-0.22 Mrt= 3.12 Mrp= 1.19 Mtp= 2.84 Principal axes: T Val= 4.88 Plg=43 Azm=320 N -0.66 41 102 P -4.22 20 210 Best Double Couple:Mo=4.6*10**17 NP1:Strike= 90 Dip=76 Slip= 48 NP2: 345 44 160
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.