USGS Body-Wave Moment Tensor Solution
12/12/21 22:28:07.42 Epicenter: -14.389 167.259 MW 6.7 USGS MOMENT TENSOR SOLUTION Depth 190 No. of sta: 42 Moment Tensor; Scale 10**19 Nm Mrr= 1.44 Mtt=-0.45 Mpp=-0.99 Mrt=-0.33 Mrp= 0.23 Mtp= 0.55 Principal axes: T Val= 1.50 Plg=81 Azm=202 N -0.13 5 326 P -1.38 8 57 Best Double Couple:Mo=1.4*10**19 NP1:Strike=322 Dip=53 Slip= 84 NP2: 153 38 98
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.