Many aspects are obviously just beginning to surface (like the variety in geothermal flux mentioned above). (realclimate.org)
I don't think the mean global geothermal flux can be a relevant measure when discusssing a volcano can it? (realclimate.org)
The authors found the five most important geologic features in predicting geothermal flux values are topography, distance to young rifts, distance to trench, depth of lithosphere - asthenosphere boundary (layers of the Earth's mantle) and depth to Mohorovičić discontinuity (the boundary between the crust and the mantle in the Earth). (sciencedaily.com)