USGS Centroid Moment Solution
NEAR COAST OF CENTRAL PERU
12/01/30 05:11:00.01 Epicenter: -14.153 -75.643 MW 6.4 USGS CENTROID MOMENT TENSOR 12/01/30 05:11:22.50 Centroid: -14.311 -75.278 Depth 42 No. of sta: 29 Moment Tensor; Scale 10**18 Nm Mrr= 4.61 Mtt=-0.86 Mpp=-3.75 Mrt=-0.79 Mrp=-1.91 Mtp= 1.60 Principal axes: T Val= 5.24 Plg=73 Azm=128 N -0.55 15 341 P -4.69 9 249 Best Double Couple:Mo=5.0*10**18 NP1:Strike=322 Dip=38 Slip= 66 NP2: 172 56 108
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.