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Identifying the most explainable fault ruptured of the 2018 Palu-Donggala earthquake in Indonesia using coulomb failure stress and geological field report
Gunawan E.a, Widiyantoro S.a,d, Supendi P.b, Nishimura T.c
a Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Indonesia
b Agency for Meteorological, Climatological and Geophysics, Indonesia
c Disaster Prevention Research Institute, Kyoto University, Japan
d Faculty of Engineering, Maranatha Christian University Bandung, 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 AuthorsThis study investigates the relation between the Coulomb failure stress of the mainshock with the aftershocks sequence following the 2018 Palu-Donggala earthquake in Indonesia. We calculate the Coulomb failure stress using the available coseismic fault models, which had varied moment magnitudes between MW7.53 ∼ MW7.62. Different interpretations of the fault sources were suggested by previous studies. While two fault models suggested that one inland fault segment ruptured during the earthquake, another fault model proposed that two fault segments ruptured inland of Central Sulawesi and along the coast of Palu bay. We further overlay the positive and negative values of Coulomb failure stress with the reported relocated aftershock. We find that only by conducting Coulomb failure stress analysis, we can not favour the preference of the coseismic fault which explains aftershock distribution. This investigation demonstrates that additional observational data from geological field surveys are required to identify the surface rupture in comparison with the coseismic fault model.[/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]Aftershocks,Coulomb failure stress,Geological field report,The 2018 Palu-Donggala earthquake[/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]This study was supported by the 2019 World Class University Research Fund of Bandung Institute of Technology for International Research No. LPPM.PN-10-30-2019 and the 2018 Overseas Research Grants of the Asahi Glass Foundation No. FTTM.PN-5-01-2019 .[/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/10.1016/j.geog.2020.04.004[/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]