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Seismic Velocity Structures beneath the Guntur Volcano Complex, West Java, Derived from Simultaneous Tomographic Inversion and Hypocenter Relocation

Journal of Mathematical and Fundamental Sciences · Vol. 45 No. 1 (2013) · hlm. 17–28

DOI
10.5614/j.math.fund.sci.2013.45.1.2
ISSN
2338-5510, 2337-5760
Terbit
2013-03-01
Penerbit
Directorate for Research and Innovation (DRI) ITB
Bahasa
eng

Abstrak

We conducted travel time tomographic inversion to image seismic velocity structures (Vp, Vs, and Vp/Vs ratio) with simultaneous hypocenter adjustment beneath the Guntur volcano complex that is located in the Garut district, West Java province, Indonesia. The Guntur volcano is one of the active volcanoes in Indonesia, although large eruptions have not occurred for about 160 years. We used volcanic and tectonic earthquakes catalog data from seismic stations deployed by Centre for Volcanology and Geological Hazard Mitigation (CVGHM). For the tomographic inversion procedure, we set grid nodes with a horizontal spacing of 2 x 2 km2 and an average vertical spacing of 2 km. Our results show low Vp, low Vs, and high Vp/Vs ratio regions beneath the Guntur crater and the Gandapura caldera at depths of 6-8 km and 7-9 km, respectively. These features can be associated with amelt-filled pore rock structure. However, a low Vp/Vs ratio and low velocities are exhibited beneath the Kamojang caldera at depths of 2-6 km that may be associated with rock with H2O-filled pores with a high aspect ratio.

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  • Bandung Institute of Technology
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Mohamad RidwanAfiliasi tidak diketahui3
Pingkan AditiawatiBandung Institute of Technology2
Ahmad SyahputraAfiliasi tidak diketahui2
Rexha Verdhora RyAfiliasi tidak diketahui2
Tepy SeptyanaAfiliasi tidak diketahui2
Arii ArdjunaAfiliasi tidak diketahui2
A. AfnimarAfiliasi tidak diketahui2
Sorja KoesumaAfiliasi tidak diketahui2
Yoichi FukudaAfiliasi tidak diketahui2
Ega Dioni PutriBandung Institute of Technology1
Massayu Leylia KhodraBandung Institute of Technology1
Harmita LestariAfiliasi tidak diketahui1
Pepen SupendiAfiliasi tidak diketahui1
Wira Hadi KusumaAfiliasi tidak diketahui1
Sastia Prama PutriAfiliasi tidak diketahui1
Magdalena Lenny SitumorangAfiliasi tidak diketahui1
Felicia Irene SaputraAfiliasi tidak diketahui1
Ulya AlviredietaAfiliasi tidak diketahui1
Irwan MeilanoAfiliasi tidak diketahui1
Moehammad AwaluddinAfiliasi tidak diketahui1
Mochamad ApriBandung Institute of Technology1
Awali PriyonoAfiliasi tidak diketahui1
Syamsurizal RizalAfiliasi tidak diketahui1
Mochamad Agus MoelyadiAfiliasi tidak diketahui1
David Prambudi SaharaAfiliasi tidak diketahui1
Malendra RusniAfiliasi tidak diketahui1
Rifki R. AriefAfiliasi tidak diketahui1
Osman R. TurendroAfiliasi tidak diketahui1
Masyhur IrsyamAfiliasi tidak diketahui1
Hiroaki YamanakaAfiliasi tidak diketahui1
F. FatkhanAfiliasi tidak diketahui1

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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">Seismic Velocity Structures beneath the Guntur Volcano Complex, West Java, Derived from Simultaneous Tomographic Inversion and Hypocenter Relocation</dc:title>
	<dc:creator>Nugraha, Andri Dian</dc:creator>
	<dc:creator>Widiyantoro, Sri</dc:creator>
	<dc:creator>Gunawan, Awan</dc:creator>
	<dc:creator>Suantika, Gede</dc:creator>
	<dc:subject xml:lang="en-US">Seismic tomography</dc:subject>
	<dc:subject xml:lang="en-US">Guntur volcano</dc:subject>
	<dc:subject xml:lang="en-US">Seismic structure</dc:subject>
	<dc:subject xml:lang="en-US">Melt-filled pore</dc:subject>
	<dc:subject xml:lang="en-US">West Java</dc:subject>
	<dc:description xml:lang="en-US">We conducted travel time tomographic inversion to image seismic velocity structures (Vp, Vs, and Vp/Vs ratio) with simultaneous hypocenter adjustment beneath the Guntur volcano complex that is located in the Garut district, West Java province, Indonesia. The Guntur volcano is one of the active volcanoes in Indonesia, although large eruptions have not occurred for about 160 years. We used volcanic and tectonic earthquakes catalog data from seismic stations deployed by Centre for Volcanology and Geological Hazard Mitigation (CVGHM). For the tomographic inversion procedure, we set grid nodes with a horizontal spacing of 2 x 2 km2 and an average vertical spacing of 2 km. Our results show low Vp, low Vs, and high Vp/Vs ratio regions beneath the Guntur crater and the Gandapura caldera at depths of 6-8 km and 7-9 km, respectively. These features can be associated with amelt-filled pore rock structure. However, a low Vp/Vs ratio and low velocities are exhibited beneath the Kamojang caldera at depths of 2-6 km that may be associated with rock with H2O-filled pores with a high aspect ratio.</dc:description>
	<dc:publisher xml:lang="en-US">Directorate for Research and Innovation (DRI) ITB</dc:publisher>
	<dc:date>2013-03-01</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/789</dc:identifier>
	<dc:identifier>10.5614/j.math.fund.sci.2013.45.1.2</dc:identifier>
	<dc:source xml:lang="en-US">Journal of Mathematical and Fundamental Sciences; Vol. 45 No. 1 (2013); 17-28</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/789/470</dc:relation>
</oai_dc:dc>