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Sensitivity of static Coulomb stress change in relation to source fault geometry and regional stress magnitude: case study of the 2016 Pidie Jaya, Aceh earthquake (Mw = 6.5), Indonesia
Kusumawati D.a, Sahara D.P.a, Nugraha A.D.a, Puspito N.T.a
a Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, 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]© 2019, Springer Nature B.V.Deformation resulting from slip on a fault plane creates stress changes in the surroundings. The stress change formulated in the Coulomb stress equation has been used to explain this type of seismic interaction. However, the sensitivity of the input parameters needs to be assessed, including the earthquake source fault geometry and the regional stress. Range analysis based on the Taguchi orthogonal array has been widely used in experimental designs to analyze the result sensitivity based on the parameters. In this study, we incorporate the Taguchi orthogonal method to analyze the sensitivity of static Coulomb stress transfer in relation to the source fault geometry and the regional stress magnitude. The 2016 Pidie Jaya, Aceh earthquake (Mw = 6.5) in Indonesia, was used as a case study. Our sensitivity result shows that the dip and strike of the source fault are the first and second parameters that have the most effect on the distribution of static Coulomb stress transfer. We, thus, used additional constraint to model these parameters, i.e., the Pidie Jaya earthquake aftershocks which were obtained from a dense local seismic network. Using the updated input model, we conducted Pidie Jaya earthquake static Coulomb stress modeling. The stress results show a better agreement between positive stress change and the aftershock distribution.[/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]2016 Pidie Jaya,Aceh earthquake (Mw = 6.5),Range analysis,Static Coulomb stress change,Taguchi orthogonal method[/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][/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/10.1007/s10950-019-09878-3[/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]