Thermal Gradients of Deep Wells and their Terrestrial Heat Flows (2)

Abstract

After the first report (Nishimura et al., 1986), deep wells, having about 1000m depth, were drilled at Kami-Cho, Tojyo-Cho, Mikata-Cho, Hidaka-Cho, Toyooka City (Hyogo Pref.), Nodagawa-Cho, Amino-Cho (Kyoto Pref.) and Otsu City (Shiga Pref.) and their terrestrial heat flows are determined as 60, 56, 163, 82, 79, 79, 105 and 62 (mW/m²), respectively.