#TITLE_ALTERNATIVE#

• Main Author: MUKTAMAR SIDIK (NIM : 10213043), IKHBAR
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22520
• Institution: Institut Teknologi Bandung

Microgravity method is a development of gravity method that has a higher accuracy. This method can also be used in geothermal monitoring and monitoring changes in the density distribution due to the deformation and determining the location of the magma chamber to be located. In this research, microgravity method is used to detect the location and process of deformation of magma on Mount Merapi. Non-linear Inversion and Global Approach methods are used to process data and interpret magma locations and magma deformation processes occurring on Mount Merapi in 1993-1994. The nonlinear inversion program used involves the Gauss-Newton method and Levenberg Marquardt method, while the global approach program used is the Particle Swarm Optimization method. After the inversion process and used Mogi's Point Source model, the results show that there is an increase and reduction of mass at some point in the area of Mount Merapi. The increase and decrease of mass is resulted from the magma deformation process that occurs. If we consider the misfit value produced in this research, solutions from Particle Swarm Optimization method is better at determining the position, depth and the amount of mass changes, but in terms of the convergence rate of the solution, the inversion with the Gauss-Newton method is better.