USGS/SLU Regional Moment Solution
SOUTHERN ONTARIO, CANADA
13/05/17 13:43:22.76 Epicenter: 45.767 -76.396 MW 4.4 USGS/SLU REGIONAL MOMENT TENSOR Depth 10 No. of sta: 41 Moment Tensor; Scale 10**15 Nm Mrr= 2.66 Mtt= 0.13 Mpp=-2.79 Mrt= 2.96 Mrp= 0.22 Mtp= 2.91 Principal axes: T Val= 5.06 Plg=50 Azm=338 N -0.19 38 134 P -4.88 12 234 Best Double Couple:Mo=5.0*10**15 NP1:Strike=115 Dip=67 Slip= 48 NP2: 1 47 147
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.