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Implications for megathrust earthquakes and tsunamis from seismic gaps south of Java Indonesia

Published version
Peer-reviewed

Change log

Authors

Widiyantoro, S. 
Gunawan, E. 
Muhari, A. 
Rawlinson, N. 
Mori, J. 

Abstract

Abstract: 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.

Description

Keywords

Article, /704/2151/508, /704/4111, /704/2151/2809, /704/2151/562, article

Journal Title

Scientific Reports

Conference Name

Journal ISSN

2045-2322

Volume Title

10

Publisher

Nature Publishing Group UK
Sponsorship
Institut Teknologi Bandung (0109/I1.B04/PL/2019, 0109/I1.B04/PL/2019, 0109/I1.B04/PL/2019)