USGS WPhase Moment Solution

SOUTH OF JAVA, INDONESIA

12/09/15 16:32:21

Epicenter: -10.770  113.855
MW 5.7

USGS/WPHASE CENTROID MOMENT TENSOR
12/09/15 16:32:21.00
Centroid:  -10.870  113.957
Depth  15         No. of sta: 15
Moment Tensor;   Scale 10**17 Nm
  Mrr=-3.65       Mtt= 3.12
  Mpp= 0.54       Mrt= 1.47
  Mrp= 0.37       Mtp=-0.76
 Principal axes:
  T  Val=  3.57  Plg=10  Azm= 12
  N     =  0.45       8      281
  P     = -4.02      76      151

Best Double Couple:Mo=3.8*10**17
 NP1:Strike=114 Dip=35 Slip= -74
 NP2:       275     56      -100

Moment Tensor Solution
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.

Moment Tensor Solution

Details on the W-phase inversion algorithm.