Hidayati, Sri, Antonius Ratdomopurbo, Kazuhiro Ishihara, and Masato Iguchi. 2016. “Focal Mechanism of Volcano-Tectonic Earthquakes at Merapi Volcano, Indonesia”. Indonesian Journal of Physics 19 (3), 75-82. https://doi.org/10.5614/itb.ijp.2008.19.3.3.