USGS Centroid Moment Solution
SOUTH OF PANAMA
12/06/04 00:45:15.59 Epicenter: 5.286 -82.580 MW 6.3 USGS CENTROID MOMENT TENSOR 12/06/04 00:45:34.29 Centroid: 5.382 -81.840 Depth 23 No. of sta: 26 Moment Tensor; Scale 10**18 Nm Mrr=-0.40 Mtt= 0.74 Mpp=-0.34 Mrt=-1.82 Mrp=-0.76 Mtp= 2.97 Principal axes: T Val= 4.03 Plg=23 Azm=142 N -1.05 61 283 P -2.99 16 45 Best Double Couple:Mo=3.5*10**18 NP1:Strike=275 Dip=85 Slip= 29 NP2: 182 62 175
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.
