ZONATION OF SEISMIC VULNERABILITY LEVELS IN SOUTH BENGKULU REGENCY, INDONESIA FOR DISASTER-BASED REGIONAL PLANNING

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. Thi...

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Bibliographic Details
Published in:Rudarsko-geološko-naftni zbornik 2024-01, Vol.39 (2), p.133-148
Main Authors: Hadi, Arif Ismul, Farid, M, Mase, Lindung Zalbuin, Refrizon, R, Purba, Shela Basaria, Fadli, Darmawan Ikhlas, Sumanjaya, Erlan
Format: Article
Language:English
Subjects:
Acceleration
Disaster management
Disaster risk
Disasters
earthquake
Earthquake prediction
Earthquakes
Emergency preparedness
Indonesia
Parameter modification
Regional planning
Risk management
Risk reduction
S waves
Seismic activity
Seismic hazard
Seismic surveys
seismic vulnerability
Seizing
Soil density
South Bengkulu
Velocity
Wave velocity
Zonation
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Summary: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.
ISSN:1849-0409
0353-4529
1849-0409
DOI:10.17794/rgn.2024.2.11