IDENTIFICATION OF SUBSURFACE STRUCTURE USING GEOMAGNETIC METHOD AND ROCK MINERAL ANALYSIS WITH XRD TEST IN GEOTHERMAL AREA OF PAYUNG VILLAGE KARO REGENCY. einstein e-j. [Internet]. 2024 Oct. 7 [cited 2026 Mar. 20];12(3):32-8. Available from: https://jurnal.unimed.ac.id/2012/index.php/einsten/article/view/51272