Geothermal energy is gaining attention worldwide as an attractive and vastly underutilized renewable energy source due to its abundance, baseload capability, resiliency, and reliability. While there are many geothermal energy concepts, the holy grail of geothermal – that would enable geothermal drilling and production in most places worldwide – is hot rock or superhot rock concepts. Developing these systems requires drilling into granitic basement formations, often at temperatures exceeding 300º C. There are two main technological challenges associated with hard hot rock geothermal concepts. First, drilling the wells is highly challenging, and second, it is essential to understand the amount of energy in the rock and how that energy flows through it. This understanding lets the geothermal operator know how much power is available and how long it will last.