GWA Galunggung was established in 2014 based on preliminary survey conducted by PT Energi Kinan Internasional, with very adequate data and information from geological, geochemical, and geophysical surveys. Galunggung's potential is estimated at 220 MW with a reservoir temperature of 225°C. The planned power plant development capacity is 55 MW with a target of commercial operation in 2030 (RUPTL, 2021). The heat source of the geothermal system in the Galunggung prospect is Mt. Galunggung and possibly Mt. Kencana. The pattern of low resistivity anomalies in the south of Galunggung Crater, which is a clay rock resulting from hydrothermal alteration, has the potential to be the host rock for the geothermal system in Galunggung. The Galunggung prospect reservoir is estimated to be under and following the pattern of the host rock. Based on Montecarlo calculations, with a 50% probability, the total geothermal potential of Mt. Galunggung is 220 MW.