USGS/SLU Regional Moment Solution
13/01/17 08:30:42.25 Epicenter: 24.395 122.004 MW 4.9 USGS/SLU REGIONAL MOMENT TENSOR Depth 20 No. of sta: 19 Moment Tensor; Scale 10**16 Nm Mrr=-0.35 Mtt= 1.96 Mpp=-1.61 Mrt= 0.82 Mrp=-0.56 Mtp= 1.67 Principal axes: T Val= 2.72 Plg=11 Azm=340 N -0.14 66 96 P -2.58 21 246 Best Double Couple:Mo=2.6*10**16 NP1:Strike= 25 Dip=67 Slip=-173 NP2: 292 83 -23
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.