USGS WPhase Moment Solution
LUZON, PHILIPPINES
12/ 6/16 22:18:48.00 Epicenter: 15.574 119.608 MW 5.9 USGS/WPHASE CENTROID MOMENT TENSOR 12/ 6/16 22:18:48.00 Centroid: 15.574 119.608 Depth 30 No. of sta: 63 Moment Tensor; Scale 10**17 Nm Mrr= 8.27 Mtt=-3.28 Mpp=-4.99 Mrt= 1.20 Mrp=-4.11 Mtp= 1.24 Principal axes: T Val= 9.49 Plg=74 Azm= 76 N = -2.67 2 336 P = -6.82 15 245 Best Double Couple:Mo=8.5*10**17 NP1:Strike=331 Dip=29 Slip= 84 NP2: 158 61 93
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.
