USGS Body-Wave Moment Tensor Solution
11/02/10 14:39:28.86 CELEBES SEA Epicenter: 4.179 122.997 MW 6.5 USGS MOMENT TENSOR SOLUTION Depth 518 No. of sta: 26 Moment Tensor; Scale 10**18 Nm Mrr=-4.92 Mtt= 1.64 Mpp= 3.27 Mrt=-2.79 Mrp=-5.82 Mtp= 3.13 Principal axes: T Val= 8.66 Plg=25 Azm=124 N -0.61 7 30 P -8.07 64 286 Best Double Couple:Mo=8.4*10**18 NP1:Strike=230 Dip=21 Slip= -69 NP2: 28 71 -98
The figure above shows a visual representation of the faulting process derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away form the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The two circles represent the axis of maximum compressional strain resulting from the earthquake (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis").