Evidences of Multiple Magma Injections in Quaternary Balerang and Rajabasa Volcanoes, Indonesia

Reza Firmansyah Hasibuan1, Tsukasa Ohba1 and Mirzam Abdurrachman2, (1)Akita University, Akita, Japan, (2)Bandung Institute of Technology (ITB), Geological Engineering, Bandung, Indonesia