USGS Body-Wave Moment Tensor Solution
OFFSHORE CHIAPAS, MEXICO
12/12/30 12:21:24.96 Epicenter: 14.502 -92.858 MW 5.3 USGS MOMENT TENSOR SOLUTION Depth 26 No. of sta: 44 Moment Tensor; Scale 10**17 Nm Mrr= 0.89 Mtt=-0.55 Mpp=-0.34 Mrt= 0.59 Mrp=-0.14 Mtp= 0.37 Principal axes: T Val= 1.10 Plg=71 Azm= 1 N -0.10 10 120 P -1.00 17 213 Best Double Couple:Mo=1.1*10**17 NP1:Strike=317 Dip=29 Slip= 110 NP2: 115 62 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.