USGS Centroid Moment Solution
NEW BRITAIN REGION, P.N.G.
12/12/15 19:30:02.34 Epicenter: -4.701 153.002 MW 6.1 USGS CENTROID MOMENT TENSOR 12/12/15 19:30:20.50 Centroid: -4.777 152.872 Depth 55 No. of sta: 75 Moment Tensor; Scale 10**18 Nm Mrr= 1.52 Mtt=-1.41 Mpp=-0.11 Mrt= 0.57 Mrp= 0.22 Mtp= 0.15 Principal axes: T Val= 1.66 Plg=76 Azm=324 N -0.14 9 93 P -1.53 10 185 Best Double Couple:Mo=1.6*10**18 NP1:Strike= 87 Dip=56 Slip= 80 NP2: 285 35 105
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.
