USGS WPhase Moment Solution
NEW BRITAIN REGION, P.N.G.
11/03/09 21:24:51 Epicenter: -6.022 149.659 MW 6.4 USGS/WPHASE CENTROID MOMENT TENSOR 11/03/09 21:24:51.00 Centroid: -6.022 149.659 Depth 29 No. of sta: 22 Moment Tensor; Scale 10**19 Nm Mrr= 0.43 Mtt=-0.40 Mpp=-0.03 Mrt= 0.33 Mrp= 0.06 Mtp=-0.05 Principal axes: T Val= 0.55 Plg=70 Azm=347 N = -0.03 1 81 P = -0.52 19 171 Best Double Couple:Mo=0.5*10**19 NP1:Strike=264 Dip=26 Slip= 93 NP2: 81 64 89
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 form 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.
