Marsyelina, Merizka, Nugroho Budi Wibowo, and Denny Darmawan. 2015. “Microtremor Characteristics and Analysis of Seismicity on Opak Fault Lines, Bantul District, Yogyakarta”. Jurnal Sains Dasar 3 (1). https://doi.org/10.21831/jsd.v3i1.2800.