USGS Body-Wave Moment Tensor Solution
OFF COAST OF NORTHERN PERU
13/03/30 17:30:48.53 Epicenter: -9.404 -79.039 MW 5.4 USGS MOMENT TENSOR SOLUTION Depth 46 No. of sta: 21 Moment Tensor; Scale 10**17 Nm Mrr= 1.47 Mtt=-0.06 Mpp=-1.41 Mrt= 0.03 Mrp= 0.63 Mtp=-0.17 Principal axes: T Val= 1.60 Plg=78 Azm=268 N -0.04 2 6 P -1.56 12 96 Best Double Couple:Mo=1.6*10**17 NP1:Strike= 5 Dip=57 Slip= 88 NP2: 189 33 93
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.