ANALISIS SUSEPTIBILITAS BATUAN DAN IDENTIFIKASI DUGAAN ZONA SESAR MENGGUNAKAN METODE MAGNETIK DI DESA PENUSUPAN, KECAMATAN PEJAWARAN, KABUPATEN BANJARNEGARA, JAWA TENGAHNIM.: 22106020006Riska SorayawatiauthorThis study aims to identify subsurface rock susceptibility values and analyze a suspected fault zone in Penusupan Village, Pejawaran District, Banjarnegara Regency. Total magnetic field measurements were conducted at 50 points across an area of approximately 2.5 km², with a 250-meter interval between points. Magnetic data processing involved diurnal variation and IGRF corrections, regional-residual anomaly separation, reduction to the pole, upward continuation, Second Vertical Derivative (SVD) and Tilt Derivative (TDR) analyses, and 2D subsurface modeling. Modeling results identified four lithological units: clayey surface soil (1 – 12) × 10⁻⁵ SI, clay (1 – 2) × 10⁻⁵ SI, sandstone 1 × 10⁻³ SI, and andesite (1 – 5) × 10⁻² SI. SVD analysis (|MIN| < |MAX|) indicates a suspected normal fault with a dominant trend ranging from Northwest–Southeast (135°– 315°) to West–East (90°–270°). The indirect interpretation of subsurface structures via the magnetic method is corroborated by TDR analysis, 2D modeling, and field geological validation, which reveal weathering zones and discontinuity planes at the suspected fault location.530 Fisika2026-08-14UIN SUNAN KALIJAGA YOGYAKARTA;FAKULTAS SAINS DAN TEKNOLOGIThesis