USGS/SLU Regional Moment Solution
13/03/10 21:17:14.00 Epicenter: 58.979 -153.860 MW 4.3 USGS/SLU REGIONAL MOMENT TENSOR Depth 89 No. of sta: 13 Moment Tensor; Scale 10**15 Nm Mrr= 0.52 Mtt=-2.50 Mpp= 1.99 Mrt= 0.98 Mrp= 1.62 Mtp= 1.61 Principal axes: T Val= 3.61 Plg=31 Azm=290 N -0.53 58 92 P -3.09 8 195 Best Double Couple:Mo=3.4*10**15 NP1:Strike= 66 Dip=75 Slip= 29 NP2: 328 62 163
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.
