Widiyantoro S, Gunawan E, Muhari A, Rawlinson N, Mori J, Hanifa N R, Susilo S, Supendi P, Shiddiqi H A, Nugraha A D, Putra H E
Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung, 40132, Indonesia.
Faculty of Engineering, Maranatha Christian University, Bandung, 40164, Indonesia.
Sci Rep. 2020 Sep 17;10(1):15274. doi: 10.1038/s41598-020-72142-z.
Relocation of earthquakes recorded by the agency for meteorology, climatology and geophysics (BMKG) in Indonesia and inversions of global positioning system (GPS) data reveal clear seismic gaps to the south of the island of Java. These gaps may be related to potential sources of future megathrust earthquakes in the region. To assess the expected inundation hazard, tsunami modeling was conducted based on several scenarios involving large tsunamigenic earthquakes generated by ruptures along segments of the megathrust south of Java. The worst-case scenario, in which the two megathrust segments spanning Java rupture simultaneously, shows that tsunami heights can reach ~ 20 m and ~ 12 m on the south coast of West and East Java, respectively, with an average maximum height of 4.5 m along the entire south coast of Java. These results support recent calls for a strengthening of the existing Indonesian Tsunami Early Warning System (InaTEWS), especially in Java, the most densely populated island in Indonesia.
印度尼西亚气象、气候和地球物理局（BMKG）记录的地震重新定位以及全球定位系统（GPS）数据反演显示，爪哇岛以南存在明显的地震空区。这些空区可能与该地区未来巨大逆冲型地震的潜在震源有关。为评估预期的淹没危险，基于几种涉及爪哇岛以南巨大逆冲断层各段破裂引发的大型海啸地震的情景进行了海啸模拟。最糟糕的情景是，横跨爪哇岛的两段巨大逆冲断层同时破裂，结果显示，在西爪哇和东爪哇的南岸，海啸高度分别可达约20米和约12米，爪哇岛整个南岸的平均最大高度为4.5米。这些结果支持了近期关于加强现有印度尼西亚海啸预警系统（InaTEWS）的呼吁，尤其是在印度尼西亚人口最密集的爪哇岛。
