USGS WPhase Moment Solution
NEW BRITAIN REGION, P.N.G.
12/09/12 4:28:14 Epicenter: -5.067 152.130 MW 5.4 USGS/WPHASE CENTROID MOMENT TENSOR 12/09/12 04:28:14.00 Centroid: -5.067 152.130 Depth 45 No. of sta: 20 Moment Tensor; Scale 10**17 Nm Mrr= 1.60 Mtt=-1.48 Mpp=-0.12 Mrt= 0.92 Mrp= 0.36 Mtp=-0.24 Principal axes: T Val= 1.89 Plg=73 Azm=330 N = -0.10 4 76 P = -1.79 15 168 Best Double Couple:Mo=1.8*10**17 NP1:Strike=265 Dip=29 Slip= 100 NP2: 74 61 84
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.
