Identification of subsurface structure using the pseudo-gravity method of magnetic data at the geothermal area of Sonai Village and its surroundings, Puriala, Konawe Regency Misbayanti Dian Ratu ; Abdul Manan ; Bahdad Bahdad ; Rani Chahyani Komunikasi Fisika Indonesia 8 Sep 2026 10.31258/jkfi.22.2.73-84