USGS Centroid Moment Solution

NORTH ISLAND OF NEW ZEALAND

12/12/07 18:19:06.59

Epicenter: -38.298  176.090
MW 6.3

USGS CENTROID MOMENT TENSOR
12/12/07 18:19:26.40
Centroid: -38.213  176.086
Depth 163         No. of sta: 62
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.07       Mtt= 0.56
  Mpp=-1.62       Mrt= 2.76
  Mrp= 0.46       Mtp=-1.88
 Principal axes:
  T  Val=  3.76  Plg=43  Azm= 15
  N       -0.20      36      241
  P       -3.55      25      131

Best Double Couple:Mo=3.6*10**18
 NP1:Strike= 69 Dip=79 Slip= 127
 NP2:       173     38        18

Moment Tensor Solution
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.

Moment Tensor Solution