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Investigation of 1D shear wave velocity profile using the spatial autocorrelation (SPAC) method: Case study at West Park ITB Campus, Bandung, Indonesia
Srigutomo W.a, Handayani G.a, Pribadi A.R.a, Nugraha A.M.a
a Physics of Earth and Complex Systems, Faculty of Mathematics and Natural Sciences, Institut Teknologi 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]© 2006-2018 Asian Research Publishing Network (ARPN).Four-station spatial autocorrelation (SPAC) array measurement to record microtremors was conducted in 2012 at West Park of ITB Ganesa Campus, Bandung, Indonesia. The measurement was aimed at revealing the shallow seismic velocity profile beneath the measured site. Autocorrelation and cross correlation calculations among the center station and the tripartite stations were carried out to provide coherence functions from which the SPAC coefficients were obtained. The SPAC coefficients were fitted to a Bessel function of the first kind of order zero yielding a dispersion curve describing relation between the phase velocity and frequency. Least-squares inversion scheme was applied to invert the dispersion curve into seismic parameters (P and S velocities, density and thickness of layers). The inversion resulted in a shallow four-layer stratified model of shear wave velocity. The shear velocity values are 342, 304 and 468 m/s for the first three layers from the surface down to 30 m deep and 1209 m/s for the half space. Based on the NEHRP classification, the Vs30 value is equal to 366 m/s indicating that the soil profile beneath the measurement site is categorized as very dense soil or soft rock.[/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]Dispersion curve,Microtremors,Shears wave velocity,SPAC coefficients,Spatial autocorrelation (SPAC) array[/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][/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]