A scientific borehole planning workshop sponsored by the International Continental Scientific Drilling Program convened in early 2020 at Cornell University in the NE United States. Cornell plans drilling to test the potential to use geothermal heat from depths of 2700–4500 m and rock temperatures of 60 to 120 °C to heat its campus. The workshop focused on designing companion scientific projects to investigate the coupled thermal–chemical–hydrological–mechanical workings of continental crust.

This contribution highlights a combined research effort to collect a combined core and down-borehole geophysics data set on two boreholes from the main island on Hawaii. The results represent one of the most complete data sets of fully cored volcanics with associated borehole measurements, which can be confidently matched directly between remote data and core. The data set and results of this study include findings which should enable improved borehole facies analysis through volcanic sequences.

The Newberry Deep Drilling Project (NDDP) will be located on the Newberry Volcano, Oregon, USA, at an idle geothermal exploration well, NWG 46-16, drilled in 2008, 3500 m deep and 340–374 °C at bottom, which will be deepened another 1000 to 1300 m to reach 500 °C. The main goals are to test EGS in the ductile/brittle transition zone and to test technology for drilling, well completion, and geophysical monitoring in a very high temperature environment.