Table 1 Model 1: horizontal cylinder. Shape index (q) and its corresponding maximum value of the R-parameter.

From: A fast imaging method for the interpretation of self-potential data with application to geothermal systems and mineral investigation

q

R-max

0.5

0.9566

0.6

0.9775

0.7

0.9912

0.8

0.9968

0.9

0.9989

1.0

1.0000

1.1

0.9991

1.2

0.9994

1.3

0.9985

1.4

0.9992

1.5

0.9985

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