USGS WPhase Moment Solution
SIMEULUE, INDONESIA
12/07/25 0:27:45 Epicenter: 2.657 96.126 MW 6.4 USGS/WPHASE CENTROID MOMENT TENSOR 12/07/25 00:27:45.00 Centroid: 2.157 95.825 Depth 17 No. of sta: 19 Moment Tensor; Scale 10**18 Nm Mrr= 2.05 Mtt=-1.34 Mpp=-0.71 Mrt= 3.28 Mrp=-3.70 Mtp= 1.01 Principal axes: T Val= 5.38 Plg=55 Azm= 53 N = -0.04 4 316 P = -5.33 33 223 Best Double Couple:Mo=5.4*10**18 NP1:Strike=296 Dip=12 Slip= 69 NP2: 137 79 94
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.
