USGS Body-Wave Moment Tensor Solution
KEPULAUAN OBI, INDONESIA
13/01/03 00:02:14.21 Epicenter: -1.560 127.395 MW 5.6 USGS MOMENT TENSOR SOLUTION Depth 16 No. of sta: 14 Moment Tensor; Scale 10**17 Nm Mrr= 0.14 Mtt=-0.69 Mpp= 0.55 Mrt= 0.32 Mrp= 0.77 Mtp= 2.85 Principal axes: T Val= 3.07 Plg=15 Azm=308 N -0.07 74 145 P -3.00 4 39 Best Double Couple:Mo=3.0*10**17 NP1:Strike=353 Dip=82 Slip= 166 NP2: 85 76 8
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.
