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Deformation under a Young Volcanic Covered Area in Southern Garut, Indonesia: Insight from 3D Gravity Modelling

Journal of Mathematical and Fundamental Sciences · Vol. 55 No. 3 (2024) · hlm. 239–253

DOI
10.5614/j.math.fund.sci.2024.55.3.3
ISSN
2338-5510, 2337-5760
Terbit
2024-06-29
Penerbit
Directorate for Research and Innovation (DRI) ITB
Bahasa
eng
Lisensi
creativecommons.org/licenses/by-nc-nd/4.0

Abstrak

Destructive earthquakes are frequently related to inland active faults. In recent years, a significant number of shallow earthquakes with low magnitude have occurred in southern Garut, West Java, Indonesia. Two earthquakes, with magnitudes of M4.2 and M3.9 in 2016 and 2017, respectively, have caused significant damage and were interpreted as indications of an active fault. We used publicly available gravity data to infer the subsurface structure that may be related to recent seismic activity. We used spectral analysis and filtering techniques for the regional-residual anomaly separation and anomaly enhancement to show the basin structure in the study area. 3D gravity inversion modelling was performed to obtain the subsurface density distribution. The result indicates the sedimentary layers with a density of 2.4 to 2.5 gr/cm3 with an underlying basement with a density of 2.65 gr/cm3. An intra-basin basement high with an NE-SW trend divides the basin into two sub-basins. This local basement high can be associated with a magmatic intrusion body and a series of young volcanic bodies located at the northeastern end of the basin. Our results emphasize a possible strong interaction between the tectonic and magmatic activities in this region.

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  • Bandung Institute of Technology
  • University of Indonesia
  • Badan Geologi
  • Institut Teknologi Sepuluh Nopember
  • Sumatera Institute of Technology
  • Universiti Teknologi Petronas
  • National Research and Innovation Agency
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Rekan penulisOrganisasiArtikel bersama
Darharta DahrinBandung Institute of Technology4
WarsaAfiliasi tidak diketahui4
Wahyudi Widyatmoko ParnadiBandung Institute of Technology3
Mohammad Syamsu RosidUniversity of Indonesia2
Abdul HarisUniversity of Indonesia2
Djoko SantosoBandung Institute of Technology2
Selvi Misnia IrawatiSumatera Institute of Technology2
Hidayat HidayatBadan Geologi2
Acep RuchimatPusat Air Tanah dan Geologi Tata Lingkungan1
Mira NailufarBandung Institute of Technology1
Neng E. JubaedahBandung Institute of Technology1
Accep HandyarsoBadan Geologi1
Wahyu SrigutomoBandung Institute of Technology1
Acep PurqonBandung Institute of Technology1
Cahyo Aji HapsoroBandung Institute of Technology1
Doddy SutarnoBandung Institute of Technology1
Tsuneomi KagiyamaInstitute for Geothermal Sciences, Graduate School of Science, Kyoto University1
Sungkono SungkonoInstitut Teknologi Sepuluh Nopember1
Prihadi SumintadiredjaAfiliasi tidak diketahui1
Diky IrawanBandung Institute of Technology1
G.M. Lucki JunursyahBadan Geologi1
Alviyanda AlviyandaSumatera Institute of Technology1
Ni Putu Juliyant Ananda Rika PangastutiAfiliasi tidak diketahui1
Rose Firdiany Nur SukmaUniversity of Indonesia1
Abi MawalidUniversity of Indonesia1
Guntur Adham SyahputraUniversity of Indonesia1
Ricky Adi WibowoUniversity of Indonesia1
Eki KomaraInstitut Teknologi Sepuluh Nopember1
Wien LestariInstitut Teknologi Sepuluh Nopember1
Muhammad Faiz NugrahaUniversiti Teknologi Petronas1
Abdul Halim Abdul LatiffUniversiti Teknologi Petronas1

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Sumber metadata: OAI-PMH (metadata jurnal) https://journals.itb.ac.id/index.php/jmfs/oai, pertama di-harvest 9 Nov 2026, terakhir terlihat 9 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Deformation under a Young Volcanic Covered Area in Southern Garut, Indonesia: Insight from 3D Gravity Modelling </dc:title>
	<dc:creator>Arisbaya, Ilham</dc:creator>
	<dc:creator>Wijanarko, Edy</dc:creator>
	<dc:creator>Sumintadireja, Prihadi</dc:creator>
	<dc:creator>Warsa, Warsa</dc:creator>
	<dc:creator>Grandis, Hendra</dc:creator>
	<dc:subject xml:lang="en-US">gravity</dc:subject>
	<dc:subject xml:lang="en-US">3D inversion</dc:subject>
	<dc:subject xml:lang="en-US">active fault</dc:subject>
	<dc:subject xml:lang="en-US">southern Garut</dc:subject>
	<dc:subject xml:lang="en-US">Indonesia</dc:subject>
	<dc:subject xml:lang="en-US">Earth Science</dc:subject>
	<dc:subject xml:lang="en-US">Geophysics</dc:subject>
	<dc:subject xml:lang="en-US">Applied Geophysics</dc:subject>
	<dc:description xml:lang="en-US">Destructive earthquakes are frequently related to inland active faults. In recent years, a significant number of shallow earthquakes with low magnitude have occurred in southern Garut, West Java, Indonesia. Two earthquakes, with magnitudes of M4.2 and M3.9 in 2016 and 2017, respectively, have caused significant damage and were interpreted as indications of an active fault. We used publicly available gravity data to infer the subsurface structure that may be related to recent seismic activity. We used spectral analysis and filtering techniques for the regional-residual anomaly separation and anomaly enhancement to show the basin structure in the study area. 3D gravity inversion modelling was performed to obtain the subsurface density distribution. The result indicates the sedimentary layers with a density of 2.4 to 2.5 gr/cm3 with an underlying basement with a density of 2.65 gr/cm3. An intra-basin basement high with an NE-SW trend divides the basin into two sub-basins. This local basement high can be associated with a magmatic intrusion body and a series of young volcanic bodies located at the northeastern end of the basin. Our results emphasize a possible strong interaction between the tectonic and magmatic activities in this region.</dc:description>
	<dc:publisher xml:lang="en-US">Directorate for Research and Innovation (DRI) ITB</dc:publisher>
	<dc:date>2024-06-29</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://journals.itb.ac.id/index.php/jmfs/article/view/20477</dc:identifier>
	<dc:identifier>10.5614/j.math.fund.sci.2024.55.3.3</dc:identifier>
	<dc:source xml:lang="en-US">Journal of Mathematical and Fundamental Sciences; Vol. 55 No. 3 (2024); 239-253</dc:source>
	<dc:source>2338-5510</dc:source>
	<dc:source>2337-5760</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journals.itb.ac.id/index.php/jmfs/article/view/20477/6964</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2024 Journal of Mathematical and Fundamental Sciences</dc:rights>
	<dc:rights xml:lang="en-US">https://creativecommons.org/licenses/by-nc-nd/4.0</dc:rights>
</oai_dc:dc>