USGS Body-Wave Moment Tensor Solution
12/11/28 08:56:15.77 Epicenter: -5.408 131.118 MW 5.6 USGS MOMENT TENSOR SOLUTION Depth 48 No. of sta: 29 Moment Tensor; Scale 10**17 Nm Mrr= 0.98 Mtt=-2.61 Mpp= 1.63 Mrt= 0.39 Mrp= 1.06 Mtp= 1.42 Principal axes: T Val= 2.77 Plg=32 Azm=287 N 0.28 58 105 P -3.04 1 197 Best Double Couple:Mo=2.9*10**17 NP1:Strike=327 Dip=67 Slip= 157 NP2: 67 69 25
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.