Ratio of true vertical component of regional Earth's Heat Flux to the subsurface Thermal Conductivity at a certain subsurface point :
G_T({\bf r}) = \frac{j_z({\bf r})}{\lambda_e({\bf r})} |
Fig. 1. Schematic view of the Earth's Geothermal Temperature Gradient. |
The most common value of Unbiased Geothermal Temperature Gradient (GT) away from tectonic plate boundaries is: .
Geology / Geothermal Temperature Field
[ Geothermal Temperature Gradient (GradT) ] [ Geothermal Temperature Profile (TG) ]