USGS Body-Wave Moment Tensor Solution
MINAHASA, SULAWESI, INDONESIA
13/09/09 21:41:36.55 Epicenter: 1.428 122.225 MW 5.4 USGS MOMENT TENSOR SOLUTION Depth 24 No. of sta: 22 Moment Tensor; Scale 10**17 Nm Mrr= 1.08 Mtt=-1.23 Mpp= 0.15 Mrt=-1.05 Mrp= 0.36 Mtp= 0.16 Principal axes: T Val= 1.54 Plg=67 Azm=210 N 0.14 7 103 P -1.68 22 10 Best Double Couple:Mo=1.6*10**17 NP1:Strike=286 Dip=67 Slip= 98 NP2: 86 24 72
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.