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Implications for megathrust earthquakes and tsunamis from seismic gaps south of Java Indonesia
Widiyantoro S.a,b, Gunawan E.a, Muhari A.c, Rawlinson N., Mori J.e, Hanifa N.R.f, Susilo S.g, Supendi P.h, Shiddiqi H.A.i, Nugraha A.D.a, Putra H.E.j
a Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung, 40132, Indonesia
b Faculty of Engineering, Maranatha Christian University, Bandung, 40164, Indonesia
c National Disaster Management Authority, Jakarta, 13120, Indonesia
d Department of Earth Sciences – Bullard Labs, University of Cambridge, Cambridge, CB3 0EZ, United Kingdom
e Disaster Prevention Research Institute, Kyoto University, Uji, 611-0011, Japan
f National Center for Earthquake Studies, Bandung, 40263, Indonesia
g Badan Informasi Geospasial, Cibinong, 16911, Indonesia
h Agency for Meteorology, Climatology and Geophysics, Bandung, 40161, Indonesia
i Department of Earth Science, University of Bergen, Bergen, 5007, Norway
j PT. Reasuransi Maipark, Multivision Tower, Jakarta, 12960, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2020, The Author(s).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.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The authors would like to thank BMKG for providing the earthquake data used in this study. We would like to acknowledge funding for this research project from Bandung Institute of Technology (ITB) through a multidisciplinary research Grant (0109/I1.B04/PL/2019). This research is also partially funded by the Ministry of Research & Technology, and Ministry of Education & Culture of Indonesia under WCU 2020 Program managed by ITB. All figures were prepared using the GMT Software (Wessel and Smith62), except Fig. 4 and Supplementary Figs 10–12 which were made using an ArcGIS Desktop license (https://pro.arcgis.com/). We also thank Frederik Tilmann and an anonymous referee for their constructive comments on the original version of this manuscript.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1038/s41598-020-72142-z[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]