USGS WPhase Moment Solution
BULGARIA
12/05/22 0:00:33 Epicenter: 42.682 23.017 MW 5.5 USGS/WPHASE CENTROID MOMENT TENSOR 12/05/22 00:00:33.00 Centroid: 42.682 23.017 Depth 12 No. of sta: 41 Moment Tensor; Scale 10**17 Nm Mrr=-2.49 Mtt= 1.90 Mpp= 0.59 Mrt=-0.16 Mrp= 0.55 Mtp=-1.28 Principal axes: T Val= 2.71 Plg= 4 Azm=212 N = -0.13 9 302 P = -2.58 79 95 Best Double Couple:Mo=2.7*10**17 NP1:Strike=292 Dip=41 Slip=-104 NP2: 130 50 -78
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.
