BATUR VOLCANO’S MAGMA CHAMBER MODELLING THROUGH MAGNETIC METHOD

• Main Author: Mega Putra, Kevin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/62054
• Institution: Institut Teknologi Bandung

Indonesia, a country known as the ring of fire for its long volcano’s curvature. A total of 127 volcanoes in Indonesia that is well-known, and one of them is Batur Volcano, which is an active stratovolcano-type volcano, and considered as one of the largest volcano in the world. Batur Volcano is located in Kintamani District, Bali. By having a subsurface image of a volcano, a model is then useful for validating other models that have been previously created using other methods. This research purpose is to model the subsurface image by using forward modeling method, and to determine the location of Batur Volcano’s magma chamber using the magnetic method. The andesite lava value was determined in the model first by using the susceptibility table with a value of 0.0135 cgs. The anomaly value shows that most of the lava is basaltic andesite with a value ranged between 0.005 to 0.1 cgs. The magma chamber in the model is seen at a depth of ± 2900 meters below sea level with an andesite composition of magma. The depth obtained is in accordance with the geological model and the susceptibility of the existing data, although the level of accuracy decreases along with the formed depth model data.