USGS WPhase Moment Solution
13/01/28 16:38:53 Epicenter: 42.603 79.695 MW 6.1 USGS/WPHASE CENTROID MOMENT TENSOR 13/01/28 16:38:53.00 Centroid: 42.703 79.831 Depth 30 No. of sta: 34 Moment Tensor; Scale 10**18 Nm Mrr=-0.07 Mtt=-1.40 Mpp= 1.47 Mrt=-0.43 Mrp=-0.24 Mtp= 0.84 Principal axes: T Val= 1.76 Plg=10 Azm=106 N = -0.06 73 236 P = -1.71 12 13 Best Double Couple:Mo=1.7*10**18 NP1:Strike=150 Dip=73 Slip=-178 NP2: 60 89 -16
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.