USGS Body-Wave Moment Tensor Solution
SOUTH OF SUMBAWA, INDONESIA
12/11/21 16:46:39.40 Epicenter: -11.374 117.943 MW 5.3 USGS MOMENT TENSOR SOLUTION Depth 20 No. of sta: 27 Moment Tensor; Scale 10**17 Nm Mrr=-0.93 Mtt= 0.76 Mpp= 0.17 Mrt=-0.23 Mrp=-0.25 Mtp=-0.58 Principal axes: T Val= 1.12 Plg= 2 Azm=211 N -0.06 21 120 P -1.06 69 306 Best Double Couple:Mo=1.1*10**17 NP1:Strike=102 Dip=51 Slip=-118 NP2: 321 47 -61
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.