USGS Body-Wave Moment Tensor Solution
13/01/15 16:09:37.09 Epicenter: -62.580 -161.396 MW 6.0 USGS MOMENT TENSOR SOLUTION Depth 8 No. of sta: 33 Moment Tensor; Scale 10**18 Nm Mrr= 0.07 Mtt= 1.32 Mpp=-1.39 Mrt= 0.33 Mrp=-0.28 Mtp= 0.30 Principal axes: T Val= 1.42 Plg=13 Azm=355 N 0.07 73 131 P -1.49 12 262 Best Double Couple:Mo=1.5*10**18 NP1:Strike= 39 Dip=73 Slip= 179 NP2: 129 89 17
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.