USGS Body-Wave Moment Tensor Solution
SOUTH OF KERMADEC ISLANDS
13/01/08 21:26:55.24 Epicenter: -34.569 179.161 MW 5.6 USGS MOMENT TENSOR SOLUTION Depth 10 No. of sta: 28 Moment Tensor; Scale 10**17 Nm Mrr= 0.98 Mtt=-3.59 Mpp= 2.61 Mrt=-0.34 Mrp= 0.70 Mtp= 1.27 Principal axes: T Val= 3.05 Plg=17 Azm=280 N 0.83 72 119 P -3.88 6 12 Best Double Couple:Mo=3.5*10**17 NP1:Strike= 57 Dip=74 Slip= 8 NP2: 325 82 164
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.