USGS Body-Wave Moment Tensor Solution
SOUTH OF KERMADEC ISLANDS
13/02/24 20:54:04.80 Epicenter: -32.137 -178.129 MW 5.5 USGS MOMENT TENSOR SOLUTION Depth 18 No. of sta: 15 Moment Tensor; Scale 10**17 Nm Mrr= 1.42 Mtt=-0.34 Mpp=-1.08 Mrt= 1.54 Mrp= 0.24 Mtp=-0.55 Principal axes: T Val= 2.31 Plg=60 Azm= 2 N -0.56 20 233 P -1.75 22 135 Best Double Couple:Mo=2.1*10**17 NP1:Strike= 61 Dip=70 Slip= 112 NP2: 192 30 45
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.