USGS WPhase Moment Solution
NEGROS, PHILIPPINES
12/11/14 5:21:43 Epicenter: 9.991 122.430 MW 5.7 USGS/WPHASE CENTROID MOMENT TENSOR 12/11/14 05:21:43.00 Centroid: 9.991 122.430 Depth 30 No. of sta: 20 Moment Tensor; Scale 10**17 Nm Mrr= 2.48 Mtt=-0.10 Mpp=-2.38 Mrt=-1.42 Mrp=-4.29 Mtp= 0.10 Principal axes: T Val= 5.29 Plg=57 Azm=115 N = -0.32 7 13 P = -4.97 30 278 Best Double Couple:Mo=5.1*10**17 NP1:Strike=345 Dip=16 Slip= 60 NP2: 195 76 98
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.
