The Identification of the Existence of a Fault Structure on Gravity and Audio Magnetotulleric Data in the Area of Mount Kubing, Belitung

Mount Kubing holds significant potential as a tourist attraction, despite being situated in tectonic zone prone to faults. Its size and attractions make it suitable for both travel exploration. Hence, the study has been conducted identify subsurface structures that can structural fault lines when mitigation occurred during an earthquake or landslide. The derivative analysis method is used determine type of structures. results indicate direction structure on Northwest-Southeast, Southwest -Northeast controlled by two different caused depression from granitic body silt with FHD SVD gravity value around -3 mGal until 1 showing indication normal reverse research location depth estimation curve (RAPS) approximately 500 meters earth. Whereas 2D Audio Magnetotelluric modelling, identified groundwater reservoir layer at 70-85 below surface which recognized semi-stressed 20-27 mv/nT complex sandstone.