USGS Body-Wave Moment Tensor Solution
SOUTH OF FIJI ISLANDS
13/05/23 17:19:05.06 Epicenter: -23.000 -177.267 MW 7.4 USGS MOMENT TENSOR SOLUTION Depth 177 No. of sta: 98 Moment Tensor; Scale 10**20 Nm Mrr=-0.53 Mtt=-0.09 Mpp= 0.63 Mrt=-0.43 Mrp=-1.34 Mtp= 0.14 Principal axes: T Val= 1.58 Plg=34 Azm=105 N -0.11 3 197 P -1.48 56 292 Best Double Couple:Mo=1.5*10**20 NP1:Strike=181 Dip=12 Slip=-106 NP2: 17 79 -87
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.