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The application of ambient noise tomography method at Opak River Fault region, Yogyakarta
Sadat D.I.K.F.a, Yudistira T.a, Nugraha A.D.a
a Geophysical Engineering, Faculty of Mining and Petroleum Engineering, Institute of Technology, 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]© 2018 Author(s).In seismology, earth’s subsurface imaging is usually use earthquake or explosive as its main sources. Ambient noise tomography is a relatively new technique to image velocity variations from natural vibrations of Earth. In this study, ambient noise tomography method is applied to Opak River Fault region, Yogyakarta, Indonesia. The fault existence was previously assumed as the source of Yogyakarta earthquake on 27 May 2006 which make it interesting to be further investigated. This research uses temporary seismometer array managed by Geo Forschungs Zentrum (GFZ) and consists of 12 stations for three months recordings (June, 1st to August, 31st 2006). Interstation Green’s function is calculated using crosscorrelation process of two records data. Then, group velocity curve is determined by Multiple Filtering Technique (MFT). The set of interstation group velocity curve are then used to create group velocity maps as a function of periods. The obtained maps show velocity contrast variations in the research area ranging from 0.4 – 2.3 km/s. The Opak River Fault is clearly indicated by velocity contrast in the western part of the research area. There is also a velocity contrast that indicated the existence of another fault located ±11 km distance eastward of Opak River Fault. This fault is possibly associated with the source of Yogyakarta earthquake on 27 May 2006.[/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]ambient noise,Opak River Fault,tomography[/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/10.1063/1.5047313[/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]