Determination of Seismic Vulnerability Index and Sediment Thickness Using the HVSR Method in Mamuju, Tapalang, and Malunda districts

DOI

10.2991/978-94-6463-520-1_5How to use a DOI?

Keywords

HVSR method; Seismic vulnerability index; sediment thickness

Abstract

Research was carried out on determination of the Seismic vulnerability index and sediment thickness using the HVSR method in Mamuju, Tapalang and Malunda districts from June 30 to July 1 2021. This research aims to determine the thickness of the sediment layer at the research site and determine the value of seismic vulnerability index. This research uses microtremor data analyzed by HVSR, this method was processed in geopsy software and considered effective in determining the characteristics of the soil layer. The HVSR method produces natural frequency parameters (f₀) and amplification (A₀) which are presented in the form of a H/V curve so that this method can estimate the seismic vulnerability index (Kg). The H/V data was then used as an input on the analysis of the ellipticity curve to obtain the value of the sediment layer thickness (h). The results from this reasearch indicate that the value of (h) in the study area ranges from 14 m to 100 m. The (h) value is in Mamuju District at points (M01, M03, M04), Tapalang (T02, T03, T04, T05), and Malunda (ML02, and ML03) so that the sedimentary rock is very thick that it is vulnerable to earthquake shocks. The value of the seismic vulnerability index (Kg) at the research site ranges from 0.1 to 15.25. Kg values tend to be in valley areas and areas close to the coast, if viewed from the geological map, the area was an alluvium formation and coastal deposits so vulnerable to potential earthquakes.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - S. Sandra
AU  - A. N. Aisy
AU  - M. Rusydi
AU  - A. Abdullah
AU  - J. Jamidun
AU  - W. O. Awaliah
AU  - R. Rahmawati
AU  - C. A. Basri
PY  - 2024
DA  - 2024/12/05
TI  - Determination of Seismic Vulnerability Index and Sediment Thickness Using the HVSR Method in Mamuju, Tapalang, and Malunda districts
BT  - Proceedings of the 5th International Seminar on Science and Technology (ISST 2023)
PB  - Atlantis Press
SP  - 27
EP  - 30
SN  - 2352-541X
UR  - https://doi.org/10.2991/978-94-6463-520-1_5
DO  - 10.2991/978-94-6463-520-1_5
ID  - Sandra2024
ER  -