USGS/SLU Regional Moment Solution
12/10/03 19:51:08.25 Epicenter: 39.723 -119.453 MW 3.4 USGS/SLU REGIONAL MOMENT TENSOR Depth 10 No. of sta: 15 Moment Tensor; Scale 10**14 Nm Mrr=-1.18 Mtt= 0.56 Mpp= 0.61 Mrt= 0.28 Mrp=-0.52 Mtp= 1.30 Principal axes: T Val= 1.90 Plg= 3 Azm=134 N -0.35 33 41 P -1.56 56 229 Best Double Couple:Mo=1.8*10**14 NP1:Strike= 16 Dip=57 Slip=-131 NP2: 254 51 -45
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.
