TY JOUR TI Integrated Analysis by Geophysical and Spatial Data to Identify the Formation of Kepuhlegundi Hot Spring on Bawean Island KW bawean KW hot spring KW geological structure KW fault fracture density KW magnetic KW gravity KW aquifer JO Russian Journal of Earth Sciences AU Rafi, M.. AU Fajar, M.. AU Ulumuddin, F.. AU Purwanto, M.. PY 2024 IS 24 PB Geophysical Center of the Russian Academy of Sciences