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MICROZONATION OF EARTHQUAKE HAZARD AREA USING THE HVSR METHOD IN THE SOUTHERN REGION OF KARANGASEM REGENCY

Jurnal Ilmiah Ilmu Terapan Universitas Jambi · Vol. 10 No. 1 (2026) · pp. 255–267

DOI
10.22437/jiituj.v10i1.50891
ISSN
2580-2259, 2580-2240
Published
2026-02-19
Publisher
LPPM Universitas Jambi
Language
en
License
creativecommons.org/licenses/by/4.0

Abstract

Southern Karangasem Regency, Bali, is located in a tectonically active zone and requires detailed local scale earthquake hazard assessment. This study aims to develop an earthquake hazard microzonation map for Bungaya, Padang Kerta, Tiyingtali, and Ababi villages by integrating microtremor analysis and seismic source modeling. Single-station microtremor measurements were analyzed using the Horizontal-to-Vertical Spectral Ratio (HVSR) method to obtain dominant frequency (f0), amplification factor (A0), and seismic vulnerability index (Kg). Peak Ground Acceleration (PGA) was estimated based on modeled earthquake sources affecting the study area. The results show that f0 values range from 0.51–8.78 Hz, A0 values from 0.8–7.46, and Kg values from 0.78–14.86, indicating varying local site conditions. The estimated PGA ranges from 157 to 171 gals, corresponding to VI–VII on the MMI scale. The spatial distribution of these parameters reveals significant variation in earthquake hazard levels across the southern Karangasem region. The novelty of this study lies in the integration of HVSR-derived site response parameters with PGA modeling to produce a detailed village-scale microzonation map. The results provide valuable implications for seismic risk mitigation, spatial planning, and earthquake-resilient infrastructure development in seismically active regions.

Keywords

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Neneng LestariAffiliation unknown1
Kharisma Nur KholifahAffiliation unknown1

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Metadata source: OAI-PMH (metadata jurnal) https://online-journal.unja.ac.id/index.php/JIITUJ/oai, first harvested 5 Nov 2026, last seen 5 Nov 2026.
Original metadata (oai_dc) 
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	<dc:title xml:lang="en">MICROZONATION OF EARTHQUAKE HAZARD AREA USING THE HVSR METHOD IN THE SOUTHERN REGION OF KARANGASEM REGENCY</dc:title>
	<dc:creator xml:lang="en">Susanti, Nova</dc:creator>
	<dc:creator xml:lang="en">Adawiyah, Rabiah Al</dc:creator>
	<dc:creator xml:lang="en">Pujaningsih, Febri Berthalita</dc:creator>
	<dc:creator xml:lang="en">Alrizal, Alrizal</dc:creator>
	<dc:creator xml:lang="en">Cipta, Athanasius</dc:creator>
	<dc:subject xml:lang="en">Earthquake Microzonation</dc:subject>
	<dc:subject xml:lang="en">HVSR Method</dc:subject>
	<dc:subject xml:lang="en">Karangasem Regency</dc:subject>
	<dc:subject xml:lang="en">Microtremor Analysis</dc:subject>
	<dc:subject xml:lang="en">Seismic Vulnerability Index</dc:subject>
	<dc:subject xml:lang="en">Peak Ground Acceleration</dc:subject>
	<dc:description xml:lang="en">Southern Karangasem Regency, Bali, is located in a tectonically active zone and requires detailed local scale earthquake hazard assessment. This study aims to develop an earthquake hazard microzonation map for Bungaya, Padang Kerta, Tiyingtali, and Ababi villages by integrating microtremor analysis and seismic source modeling. Single-station microtremor measurements were analyzed using the Horizontal-to-Vertical Spectral Ratio (HVSR) method to obtain dominant frequency (f0), amplification factor (A0), and seismic vulnerability index (Kg). Peak Ground Acceleration (PGA) was estimated based on modeled earthquake sources affecting the study area. The results show that f0 values range from 0.51–8.78 Hz, A0 values from 0.8–7.46, and Kg values from 0.78–14.86, indicating varying local site conditions. The estimated PGA ranges from 157 to 171 gals, corresponding to VI–VII on the MMI scale. The spatial distribution of these parameters reveals significant variation in earthquake hazard levels across the southern Karangasem region. The novelty of this study lies in the integration of HVSR-derived site response parameters with PGA modeling to produce a detailed village-scale microzonation map. The results provide valuable implications for seismic risk mitigation, spatial planning, and earthquake-resilient infrastructure development in seismically active regions.</dc:description>
	<dc:publisher xml:lang="en">LPPM Universitas Jambi</dc:publisher>
	<dc:date>2026-02-19</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://online-journal.unja.ac.id/JIITUJ/article/view/50891</dc:identifier>
	<dc:identifier>10.22437/jiituj.v10i1.50891</dc:identifier>
	<dc:source xml:lang="en">Jurnal Ilmiah Ilmu Terapan Universitas Jambi; Vol. 10 No. 1 (2026): Volume 10, Nomor 1, February 2026; 255-267</dc:source>
	<dc:source>2580-2259</dc:source>
	<dc:source>2580-2240</dc:source>
	<dc:language>en</dc:language>
	<dc:relation>https://online-journal.unja.ac.id/JIITUJ/article/view/50891/23800</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2026 Nova Susanti, Rabiah Al Adawiyah, Febri Berthalita Pujaningsih, Alrizal Alrizal, Athanasius Cipta</dc:rights>
	<dc:rights xml:lang="en">https://creativecommons.org/licenses/by/4.0</dc:rights>
</oai_dc:dc>