USGS Centroid Moment Solution
BANDA SEA
12/12/10 16:53:09.15 Epicenter: -6.540 129.815 MW 7.1 USGS CENTROID MOMENT TENSOR 12/12/10 16:53:23.50 Centroid: -6.567 129.823 Depth 148 No. of sta: 85 Moment Tensor; Scale 10**19 Nm Mrr= 0.88 Mtt=-4.08 Mpp= 3.20 Mrt= 1.79 Mrp= 3.29 Mtp= 0.29 Principal axes: T Val= 5.70 Plg=36 Azm=279 N -0.96 46 59 P -4.74 21 173 Best Double Couple:Mo=5.2*10**19 NP1:Strike= 49 Dip=81 Slip= 43 NP2: 311 48 167
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.
