USGS Body-Wave Moment Tensor Solution
11/10/23 10:41:22.26 Epicenter: 38.681 43.442 MW 7.1 USGS MOMENT TENSOR SOLUTION Depth 20 No. of sta: 85 Moment Tensor; Scale 10**19 Nm Mrr= 5.59 Mtt=-6.74 Mpp= 1.15 Mrt=-0.72 Mrp=-1.14 Mtp=-0.35 Principal axes: T Val= 5.89 Plg=76 Azm=102 N 0.91 13 266 P -6.80 4 357 Best Double Couple:Mo=6.4*10**19 NP1:Strike=255 Dip=50 Slip= 73 NP2: 101 43 109
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.