Prediction of Occurrence of Discrete Events - Geomathematics: Theoretical Foundations, Applications and Future Developments - page 184

Table 5.8 Seafloor example. Comparison of WLR results
Variable W + s (W + ) W s (W ) W R + s (W R + )W R s (W R )

Age 1.77205 0.30180 1.71651 0.70713 1.96126 0.37914 1.89979 0.81868

Topography 0.67433 0.33344 0.74367 0.50004 0.36013 0.41223 0.34885 0.60241

Contact 1.18719 0.31640 1.19888 0.57738 0.28949 0.35277 0.28041 0.63265

Rock type 0.42831 0.40835 0.26130 0.37801 0.04663 0.44083 0.04517 0.41710

No fissures 0.04299 0.57743 0.13127 0.31628 0.19919 0.62718 0.19294 0.37332

Source: Agterberg ( 2011 , Table 3)

40

35

30

25

20

15

10

5

0

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4

Posterior probability

Fig. 5.29 Seafloor Example: Hydrothermal vents on East Pacific Rise. Estimated and observed
numbers of vents in 5-layer model (Source: Agterberg and Cheng 2002 , Fig. 1)

Table 5.9 Estimation of
T and s 2 ( T ) for 3-layer model

Area (km 2 ) N IJK 2 s 2 ( P f )

IJK P f s ( P f ) N IJK P f

222 1.344 0.0003 0.0005 0.0403 0.0045

212 0.9007 0.0057 0.0065 0.5134 0.3428

221 0.4351 0.0008 0.0013 0.0348 0.0032

122 0.4187 0.0111 0.0126 0.4648 0.2783

112 0.3415 0.1709 0.0907 5.8362 9.5939

211 0.2223 0.0154 0.0176 0.3423 0.1531

111 0.1771 0.3604 0.153 6.3827 7.3421

121 0.1456 0.0297 0.336 0.4324 23.9332

Sum 3.985 14.0470 41.6511

Source: Agterberg and Cheng ( 2002 , Table 3)
I age, J topography, K rock type; N ¼100 Area