USGS Body-Wave Moment Tensor Solution
EASTERN NEW GUINEA REG., P.N.G.
13/04/04 14:10:15.97 Epicenter: -5.589 147.216 MW 5.3 USGS MOMENT TENSOR SOLUTION Depth 175 No. of sta: 9 Moment Tensor; Scale 10**17 Nm Mrr= 0.32 Mtt=-0.89 Mpp= 0.57 Mrt= 0.50 Mrp=-0.32 Mtp=-0.53 Principal axes: T Val= 1.06 Plg=34 Azm= 65 N 0.11 52 276 P -1.17 15 166 Best Double Couple:Mo=1.1*10**17 NP1:Strike=211 Dip=54 Slip= 15 NP2: 112 78 143
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.