USGS Body-Wave Moment Tensor Solution
JAN MAYEN ISLAND REGION
12/08/30 13:43:24.75 Epicenter: 71.451 -10.900 MW 6.6 USGS MOMENT TENSOR SOLUTION Depth 16 No. of sta: 45 Moment Tensor; Scale 10**19 Nm Mrr= 0.11 Mtt= 0.69 Mpp=-0.79 Mrt=-0.22 Mrp=-0.19 Mtp= 0.66 Principal axes: T Val= 1.02 Plg=17 Azm=158 N 0.03 72 355 P -1.05 5 250 Best Double Couple:Mo=1.0*10**19 NP1:Strike=295 Dip=75 Slip= 9 NP2: 203 82 164
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.