USGS Centroid Moment Solution
NEW IRELAND REGION, P.N.G.
12/07/28 20:03:56.76 Epicenter: -4.655 153.159 MW 6.5 USGS CENTROID MOMENT TENSOR 12/07/28 20:04:17.20 Centroid: -4.799 152.944 Depth 59 No. of sta: 104 Moment Tensor; Scale 10**18 Nm Mrr= 6.20 Mtt=-6.76 Mpp= 0.57 Mrt= 2.84 Mrp= 1.76 Mtp= 1.56 Principal axes: T Val= 7.41 Plg=69 Azm=307 N 0.12 18 95 P -7.53 10 189 Best Double Couple:Mo=7.5*10**18 NP1:Strike= 83 Dip=58 Slip= 68 NP2: 300 38 121
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.
