USGS WPhase Moment Solution
BANDA SEA
11/08/30 6:57:41 Epicenter: -6.400 126.773 MW 6.9 USGS/WPHASE CENTROID MOMENT TENSOR 11/08/30 06:57:41.00 Centroid: -6.400 126.773 Depth 480 No. of sta: 56 Moment Tensor; Scale 10**19 Nm Mrr=-0.92 Mtt= 0.11 Mpp= 0.81 Mrt= 0.73 Mrp= 2.31 Mtp=-0.12 Principal axes: T Val= 2.46 Plg=35 Azm=279 N = 0.22 6 14 P = -2.69 53 113 Best Double Couple:Mo=2.6*10**19 NP1:Strike=340 Dip=11 Slip=-125 NP2: 195 81 -83
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.
