USGS WPhase Moment Solution
ICELAND REGION
12/10/21 1:25:23 Epicenter: 66.328 -18.751 MW 5.5 USGS/WPHASE CENTROID MOMENT TENSOR 12/10/21 01:25:23.00 Centroid: 66.228 -19.000 Depth 11 No. of sta: 33 Moment Tensor; Scale 10**17 Nm Mrr=-1.88 Mtt= 0.03 Mpp= 1.85 Mrt= 0.78 Mrp=-0.07 Mtp=-0.59 Principal axes: T Val= 2.05 Plg= 4 Azm= 72 N = 0.11 19 340 P = -2.16 69 174 Best Double Couple:Mo=2.1*10**17 NP1:Strike=182 Dip=44 Slip= -61 NP2: 325 52 -115
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.
