USGS/SLU Regional Moment Solution
SOUTHERN ITALY
13/02/16 21:16:12.59 Epicenter: 41.746 13.571 MW 4.8 USGS/SLU REGIONAL MOMENT TENSOR Depth 21 No. of sta: 39 Moment Tensor; Scale 10**16 Nm Mrr=-1.92 Mtt= 0.42 Mpp= 1.51 Mrt= 0.76 Mrp= 0.37 Mtp=-1.11 Principal axes: T Val= 2.20 Plg= 1 Azm= 58 N 0.08 23 327 P -2.28 67 151 Best Double Couple:Mo=2.2*10**16 NP1:Strike=169 Dip=48 Slip= -59 NP2: 307 51 -120
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.
