USGS WPhase Moment Solution
EASTERN NEW GUINEA REG, PAPUA NEW GUINEA
13/02/01 2:17:23.1 Epicenter: -6.917 147.665 MW 5.8 USGS/WPHASE CENTROID MOMENT TENSOR 13/02/01 02:17:23.10 Centroid: -6.917 147.967 Depth 11 No. of sta: 7 Moment Tensor; Scale 10**17 Nm Mrr=-1.05 Mtt=-4.97 Mpp= 6.03 Mrt= 2.36 Mrp= 1.76 Mtp= 1.57 Principal axes: T Val= 6.82 Plg=15 Azm=280 N = -0.69 61 40 P = -6.12 23 183 Best Double Couple:Mo=6.5*10**17 NP1:Strike=324 Dip=62 Slip=-173 NP2: 231 84 -28
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.
