Statistical framework validates geothermal development stages globally

⚡ AI Executive Summary

Researchers have developed a data-driven methodology to identify and validate distinct phases in geothermal energy deployment across leading markets from 1945 to 2024, using statistical break-point analysis rather than subjective visual assessment. The analysis reveals that the global geothermal sector experienced significant structural shifts in 1977, 1989, and 2012, with acceleration following the most recent inflection point. Individual countries show markedly different maturation pathways when benchmarked against the U.S. trajectory—some tracking closely through multiple stages, others diverging significantly in recent years. For power-systems planners, this framework offers practical value: it provides quantitative evidence of when geothermal markets transition from early exploration to sustained deployment, helping utilities and grid operators anticipate generation portfolio shifts. The heterogeneous country pathways underscore that geothermal penetration depends not just on resource availability but on policy timing and investment cycles. Understanding these staged transitions informs realistic timelines for incorporating baseload geothermal capacity into decarbonization roadmaps, particularly for systems seeking to replace coal or natural gas with dispatchable renewables. The U.S. post-2015 slowdown signals that maturing markets may require targeted policy intervention to sustain growth.