Anyone thinking about earthquakes when going that deep?
In Switzerland they had to stop some geothermal projects after triggering earthquakes while drilling deep.
The geothermal projects in Switzerland (and South Korea) used pressurized water to form cracks within the rock (similar to fracking). Also typical geothermal projects need to be near fault lines since that is where the low hanging fruit is. Since this method will forgo those steps you should greatly minimize the likelihood of triggering an earthquake.