USGS WPhase Moment Solution
SICHUAN-YUNNAN-GUIZHOU RG, CHINA
12/ 9/ 7 3:19:42.00 Epicenter: 27.507 103.928 MW 5.5 USGS/WPHASE CENTROID MOMENT TENSOR 12/ 9/ 7 3:19:42.00 Centroid: 27.307 104.491 Depth 11 No. of sta: 34 Moment Tensor; Scale 10**17 Nm Mrr= 1.67 Mtt=-0.25 Mpp=-1.42 Mrt=-0.90 Mrp=-0.98 Mtp=-0.84 Principal axes: T Val= 2.14 Plg=69 Azm=146 N = 0.14 8 33 P = -2.28 18 300 Best Double Couple:Mo=2.2*10**17 NP1:Strike= 17 Dip=28 Slip= 72 NP2: 217 64 99
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.
