Hidayati, S., Ratdomopurbo, A., Ishihara, K. and Iguchi, M. 2016. Focal Mechanism of Volcano-tectonic Earthquakes at Merapi Volcano, Indonesia. Indonesian Journal of Physics. 19, 3 (Nov. 2016), 75-82. DOI:https://doi.org/10.5614/itb.ijp.2008.19.3.3.