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Table 1 Values of standard deviation variance reduction for the P and S data after the step of source locations at different iterations

From: Seismic tomography of the area of the 2010 Beni-Ilmane earthquake sequence, north-central Algeria

Iteration

P-residual deviation, s

P-residual reduction, %

S-residual deviation, s

S-residual reduction, %

1

0.153

0

0.150

0

2

0.090

40.7

0.070

53.6

3

0.089

41.4

0.067

55.4