USGS WPhase Moment Solution
EASTERN IRAN
12/12/ 5 17: 8:12.00 Epicenter: 33.490 59.554 MW 5.8 USGS/WPHASE CENTROID MOMENT TENSOR 12/12/ 5 17: 8:12.00 Centroid: 33.490 59.314 Depth 11 No. of sta: 42 Moment Tensor; Scale 10**17 Nm Mrr= 2.40 Mtt=-1.79 Mpp=-0.60 Mrt= 0.78 Mrp= 3.72 Mtp= 3.57 Principal axes: T Val= 5.90 Plg=45 Azm=300 N = -0.57 39 151 P = -5.33 15 47 Best Double Couple:Mo=5.6*10**17 NP1:Strike= 96 Dip=45 Slip= 26 NP2: 347 72 132
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.
