USGS Body-Wave Moment Tensor Solution
NEW BRITAIN REGION, P.N.G.
12/12/15 19:30:02.34 Epicenter: -4.701 153.002 MW 6.1 USGS MOMENT TENSOR SOLUTION Depth 53 No. of sta: 37 Moment Tensor; Scale 10**18 Nm Mrr= 1.70 Mtt=-1.36 Mpp=-0.34 Mrt= 0.86 Mrp= 0.21 Mtp= 0.25 Principal axes: T Val= 1.95 Plg=74 Azm=336 N -0.34 9 97 P -1.61 14 189 Best Double Couple:Mo=1.8*10**18 NP1:Strike= 91 Dip=59 Slip= 80 NP2: 291 32 106
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.