In this study, we develop a design for the cost‐effective placement of tsunameters around the southern Java region. As a reference for the design, we utilize multiple stochastic tsunami sources generated by hypothetical thrust earthquakes with Mw 8.8–9.2 occurring on the plate interface. [You can read this paper here.](http://amy-l-williamson.github.io/files/Mulia_etal_2019.pdf) Recommended citation: Mulia, I. E., Gusman, A. R., Williamson, A. L., & Satake, K. (2019). An optimized array configuration of tsunami observation network off Southern Java, Indonesia. Journal of Geophysical Research: Solid Earth, 124(9), 9622-9637. 