USGS/SLU Regional Moment Solution
13/02/13 00:10:14.26 Epicenter: 38.028 -118.052 MW 5.1 USGS/SLU REGIONAL MOMENT TENSOR Depth 9 No. of sta: 43 Moment Tensor; Scale 10**16 Nm Mrr=-0.48 Mtt=-1.13 Mpp= 1.61 Mrt= 1.27 Mrp=-1.69 Mtp= 4.58 Principal axes: T Val= 5.09 Plg= 7 Azm=125 N 0.29 66 20 P -5.38 23 218 Best Double Couple:Mo=5.2*10**16 NP1:Strike=354 Dip=79 Slip=-159 NP2: 259 69 -12
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.