USGS Body-Wave Moment Tensor Solution
12/02/14 08:19:55.91 Epicenter: -10.380 161.052 MW 6.3 USGS MOMENT TENSOR SOLUTION Depth 45 No. of sta: 71 Moment Tensor; Scale 10**18 Nm Mrr= 2.06 Mtt=-0.52 Mpp=-1.54 Mrt=-2.24 Mrp=-0.13 Mtp= 2.99 Principal axes: T Val= 3.95 Plg=47 Azm=150 N 0.42 40 305 P -4.37 13 46 Best Double Couple:Mo=4.2*10**18 NP1:Strike=176 Dip=48 Slip= 151 NP2: 286 69 46
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.