Zonation of Seismic Vulnerability Levels in South Bengkulu Regency, Indonesia for Disaster-Based Regional Planning

Authors

  • Arif Ismul Hadi Universitas Bengkulu https://orcid.org/0000-0002-0728-8241
  • M Farid Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
  • Lindung Zalbuin Mase Department of Civil Engineering, Faculty of Engineering, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia https://orcid.org/0000-0002-0470-0149
  • Refrizon Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia https://orcid.org/0000-0002-7951-640X
  • Shela Basaria Purba Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu, 38371, Indonesia
  • Darmawan Ikhlas Fadli Department of Geophysics, Faculty of Mathematics and Natural Sciences, the University of Bengkulu, Jl. WR Supratman, Bengkulu https://orcid.org/0000-0003-0383-9875
  • Erlan Sumanjaya Department of Geodetic Engineering, Faculty of Engineering, the University of Lampung, Jl. Prof. Dr. Sumantri Brojonegoro No. 1, Bandar Lampung 35141, Indonesia, https://orcid.org/0000-0001-6889-6569

DOI:

https://doi.org/10.17794/rgn.2024.2.11

Keywords:

earthquake, disaster risk, seismic vulnerability, South Bengkulu; Indonesia

Abstract

The accurate prediction and prevention of earthquakes remains challenging. Consequently, the primary approach to mitigate the impact of earthquakes is through disaster risk reduction efforts. One significant strategy involves conducting seismic vulnerability analyses based on disaster scenarios. This study aims to identify and map areas with varying levels of seismic vulnerability, analyzing the factors contributing to vulnerability in the South Bengkulu Regency. Secondary data, including peak ground acceleration (PGA) values, were collected, along with microtremor data obtained through the Horizontal to Vertical Spectral Ratio (HVSR) method. The recorded microtremor data serve as input parameters for PGA, Modified Mercalli Intensity (MMI), Seismic Vulnerability Index (Kg), shear wave velocity (Vs), and the time-averaged shear wave velocity for the first 30 m depths (Vs30) values. The findings reveal that, overall, seismic vulnerability in the South Bengkulu Regency can be categorized as low. However, specific areas, particularly in the southwestern and northeastern zones, exhibit relatively higher levels of vulnerability. The heightened vulnerability in these areas is attributed to elevated PGA values, despite the region's generally high soil density, which acts as a mitigating factor against earthquake threats.

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Published

2024-04-28

How to Cite

Hadi, A. I., Farid, M., Mase, L. Z. ., Refrizon, Purba, S. B., Fadli, D. I., & Sumanjaya, E. (2024). Zonation of Seismic Vulnerability Levels in South Bengkulu Regency, Indonesia for Disaster-Based Regional Planning. Rudarsko-geološko-Naftni Zbornik, 39(2), 133–148. https://doi.org/10.17794/rgn.2024.2.11

Issue

Vol. 39 No. 2 (2024): No. 68

Section

Geology

License

Copyright (c) 2024 Arif Ismul Hadi, M Farid, Lindung Zalbuin Mase, Refrizon, Shela Basaria Purba, Darmawan Ikhlas Fadli, Erlan Sumanjaya

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