USGS Body-Wave Moment Tensor Solution
12/11/29 19:32:33.61 Epicenter: 13.756 -92.132 MW 5.5 USGS MOMENT TENSOR SOLUTION Depth 3 No. of sta: 58 Moment Tensor; Scale 10**17 Nm Mrr= 1.69 Mtt=-0.62 Mpp=-1.07 Mrt= 1.33 Mrp=-0.80 Mtp= 0.75 Principal axes: T Val= 2.35 Plg=67 Azm= 19 N -0.16 10 133 P -2.19 21 227 Best Double Couple:Mo=2.3*10**17 NP1:Strike=335 Dip=26 Slip= 114 NP2: 129 67 79
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.