Fig. 15From: A machine learning approach for mapping the very shallow theoretical geothermal potentialSlope fitting for diffusivity estimation example. The linear fit between \(\ln \left( R_{n} \right)\) and \(z\sqrt{n}\) is shown for the three dominant harmonics (\(n=m_{1},m_{2},m_{3}\)) in Fourier analysis in Bern, in 2013, 2014, 2015, and 2016Back to article page