ANALISIS ANOMALI MAGNETIK SEKITAR GUNUNG API PAPANDAYAN MENGGUNAKAN METODE MAGNETIK (DAERAH LERENG TIMUR GUNUNG API PAPANDAYAN)

• Main Author: Anwar Ra'if, Kurnia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/49169
• Institution: Institut Teknologi Bandung

Indonesia has many active volcanos, which are distributed in the territory of Sumatera and Java. A surrounding area in an active volcano is often to appear the surface manifestation like a hot spring that can be used for directly and indirectly. One of many active volcanoes in West Java is Papandayan Volcano. Papandayan Volcano is an active volcano in Indonesia located in Garut, West Java. Papandayan Volcano has many calderas in that mountain, which are Baru Caldera, Mas Caldera, Nangklak Caldera, and Manuk Caldera. To analyze the distribution of heat sources in Papandayan Volcano can do by geophysical survey. Geophysical survey is an activity as a part of Earth Physics for the identification of the subsurface structure. The survey uses a magnetic method which is using magnetic susceptibility as a physical parameter for knowing magnetic anomaly. The field data acquisition has 65 points measurement with 100 meters spacing for every point, and the length of trajectory is six kilometers. The field data acquisition was carried out in 2019 in the surrounding area of Papandayan Volcano using set tools of G-856AX Memory MagTM Proton Precession Magnetometer (PPM). Based on observing directly, there is the hot spring around the river area. The result of forward modeling and inversion modeling have negative anomaly around the caldera and river area. The hypothesis from modeling result, there is a magmatic intrusion on the caldera and around the river area from high temperature because of the volcano system under the subsurface.