USGS WPhase Moment Solution
NEW BRITAIN REGION, P.N.G.
13/03/10 22:51:56 Epicenter: -6.748 148.241 MW 6.5 USGS/WPHASE CENTROID MOMENT TENSOR 13/03/10 22:51:56.00 Centroid: -6.548 148.342 Depth 19 No. of sta: 40 Moment Tensor; Scale 10**18 Nm Mrr= 0.32 Mtt=-1.26 Mpp= 0.94 Mrt=-1.57 Mrp=-2.23 Mtp= 6.54 Principal axes: T Val= 7.50 Plg=20 Azm=129 N = -0.70 69 316 P = -6.80 2 220 Best Double Couple:Mo=7.2*10**18 NP1:Strike=267 Dip=74 Slip= 13 NP2: 173 77 163
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.
