USGS Centroid Moment Solution
PAPUA, INDONESIA
12/09/08 10:51:43.01 Epicenter: -3.190 135.084 MW 6.1 USGS CENTROID MOMENT TENSOR 12/09/08 10:51:57.70 Centroid: -3.234 135.037 Depth 28 No. of sta: 73 Moment Tensor; Scale 10**18 Nm Mrr= 0.84 Mtt=-1.27 Mpp= 0.43 Mrt=-0.69 Mrp=-0.94 Mtp=-0.31 Principal axes: T Val= 1.65 Plg=53 Azm=102 N 0.01 29 240 P -1.66 21 342 Best Double Couple:Mo=1.6*10**18 NP1:Strike=111 Dip=35 Slip= 147 NP2: 229 72 59
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.
