USGS Centroid Moment Solution
PHILIPPINE ISLANDS REGION
12/08/31 12:47:34.48 Epicenter: 10.831 126.651 MW 7.6 USGS CENTROID MOMENT TENSOR 12/08/31 12:47:58.00 Centroid: 10.992 127.028 Depth 44 No. of sta: 181 Moment Tensor; Scale 10**20 Nm Mrr= 3.25 Mtt= 0.23 Mpp=-3.48 Mrt=-0.34 Mrp=-0.49 Mtp=-0.32 Principal axes: T Val= 3.32 Plg=83 Azm=147 N 0.23 5 6 P -3.54 4 275 Best Double Couple:Mo=3.4*10**20 NP1:Strike=359 Dip=41 Slip= 82 NP2: 190 50 97
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.
