USGS Body-Wave Moment Tensor Solution
BOUGAINVILLE REGION, P.N.G.
13/08/20 21:17:59.29 Epicenter: -6.271 154.486 MW 5.2 USGS MOMENT TENSOR SOLUTION Depth 38 No. of sta: 37 Moment Tensor; Scale 10**16 Nm Mrr= 7.62 Mtt=-2.37 Mpp=-5.26 Mrt=-0.74 Mrp=-1.99 Mtp= 5.58 Principal axes: T Val= 8.22 Plg=74 Azm=130 N 1.43 16 324 P -9.65 4 233 Best Double Couple:Mo=9.0*10**16 NP1:Strike=306 Dip=44 Slip= 66 NP2: 157 51 111
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.