USGS Body-Wave Moment Tensor Solution
COSTA RICA
12/10/24 00:45:34.21 Epicenter: 10.121 -85.314 MW 6.4 USGS MOMENT TENSOR SOLUTION Depth 22 No. of sta:115 Moment Tensor; Scale 10**18 Nm Mrr= 2.49 Mtt=-1.83 Mpp=-0.66 Mrt= 2.53 Mrp=-1.10 Mtp= 2.60 Principal axes: T Val= 3.66 Plg=64 Azm=356 N 1.23 15 121 P -4.89 20 216 Best Double Couple:Mo=4.4*10**18 NP1:Strike=331 Dip=28 Slip= 124 NP2: 114 67 73
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.
