USGS Body-Wave Moment Tensor Solution
SOUTH OF PANAMA
12/06/04 03:15:24.53 Epicenter: 5.507 -82.457 MW 6.1 USGS MOMENT TENSOR SOLUTION Depth 6 No. of sta: 65 Moment Tensor; Scale 10**18 Nm Mrr=-0.44 Mtt= 1.60 Mpp=-1.17 Mrt= 0.30 Mrp= 0.20 Mtp= 0.65 Principal axes: T Val= 1.80 Plg= 9 Azm=347 N -0.47 78 212 P -1.33 9 78 Best Double Couple:Mo=1.6*10**18 NP1:Strike= 33 Dip=90 Slip= 168 NP2: 123 78 0
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.
