USGS WPhase Moment Solution
SOUTH OF SUMBAWA, INDONESIA
12/11/21 16:46:39 Epicenter: -11.375 117.921 MW 5.4 USGS/WPHASE CENTROID MOMENT TENSOR 12/11/21 16:46:39.00 Centroid: -11.575 118.023 Depth 23 No. of sta: 15 Moment Tensor; Scale 10**17 Nm Mrr=-1.52 Mtt= 1.56 Mpp=-0.04 Mrt=-0.78 Mrp= 0.01 Mtp=-0.32 Principal axes: T Val= 1.80 Plg=13 Azm=190 N = -0.09 4 99 P = -1.71 76 351 Best Double Couple:Mo=1.8*10**17 NP1:Strike=286 Dip=32 Slip= -81 NP2: 96 58 -95
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.