HVSR Microtremor Analysis to Assess Subsurface Fault Characteristics and Geothermal Potential in Kepahiang

Authors

  • Muhammad Rifqi Rabbani Geophysics Study Program, University of Bengkulu
  • Arif Ismul Hadi Geophysics Study Program, University of Bengkulu
  • Budi Harlianto Geophysics Study Program, University of Bengkulu
  • Muchammad Farid Geophysics Study Program, University of Bengkulu
  • Hana Raihana Geophysics Study Program, University of Bengkulu
  • Arya Putra Anggi Geophysics Study Program, University of Bengkulu

DOI:

https://doi.org/10.70561/geocelebes.v9i2.43347

Keywords:

Air Sempiang, Fault, Geothermal, Microseismic

Abstract

Kepahiang, Bengkulu, is an area with considerable geothermal potential, especially in the Air Sempiang and Babakan Bogor areas. This study aims to analyze subsurface fault characteristics and assess geothermal potential using the Horizontal-to-Vertical Spectral Ratio (HVSR) microtremor method. This passive seismic method is used to determine key geophysical parameters, including dominant frequency (f0), amplification factor (A0), shear wave velocity (vs), and primary wave velocity (vp), which are essential for characterizing subsurface geological structures and identifying geothermal reservoir zones. The results show that dominant frequency values in Kepahiang range from 1.24 Hz to 20.45 Hz, while the amplification factor varies between 1.29 and 7.22. vs values range from 121.61 m/s to 3251.79 m/s, and vp values range from 214.91 m/s to 6469.79 m/s. These findings suggest that the surface layer consists mainly of alluvium and hard sandy gravel, with thicknesses varying between 10 and 50 meters. The 3D subsurface model constructed from the data indicates the presence of fault-controlled geothermal manifestations, mainly influenced by the Babakan Bogor Fault and Bogor Fault. These faults facilitate the upward migration of geothermal fluids, forming surface manifestations such as hot springs, fumaroles, and altered rocks. The geothermal system in the study area is classified as a low-temperature geothermal system, mainly caused by residual magmatic heat from Kaba Mountain and Bukit Hitam Crater. This research provides important insights for geothermal energy exploration and geotourism development in Kepahiang. These findings serve as a scientific basis for future geothermal resource assessment, land use planning, and sustainable energy utilization.

References

Andriany, S. S., Fatimah, M. R., & Hardiyono, A. (2016). Geowisata Geopark Ciletuh: Geotrek Mengelilingi Keindahan Mega Amfiteater Ciletuh (the Magical of Ciletuh Amphitheater). Bulletin of Scientific Contribution, 14(1), 75–88. https://jurnal.unpad.ac.id/bsc/article/view/9796

Arifin, S. S., Mulyatno, B. S., Marjiyono, M., & Setianegara, R. (2014). Penentuan Zona Rawan Guncangan Bencana Gempa Bumi Berdasarkan Analisis Nilai Amplifikasi HVSR Mikrotremor dan Analisis Periode Fundamental Daerah Liwa dan Sekitarnya. Jurnal Geofisika Eksplorasi, 2(1), 30–40. https://journal.eng.unila.ac.id/index.php/geo/article/view/217/211

Arintalofa, V., Yulianto, G., & Harmoko, U. (2020). Analisa Mikrotremor Menggunakan Metode HVSR untuk Mengetahui Karakteristik Bawah Permukaan Manifestasi Panas Bumi Diwak dan Derekan Berdasarkan Nilai Vp. Jurnal Energi Baru Dan Terbarukan, 1(2), 54–61. https://doi.org/10.14710/jebt.2020.9276

Arisona, A., Manginsih, S. L., Praja, N. K., Hasria, H., & Azhar, A. (2023). Pemetaan Lapisan Tanah Menggunakan Data Mikrotremor HVSR dan Dampaknya Terhadap Daya Dukung Tanah di Kawasan Kota Kendari. Jurnal Geologi Dan Sumberdaya Mineral, 24(1), 51–58. https://doi.org/10.33332/jgsm.geologi.v24i1.724

Bard, P., Duval, A., Koehler, A., & Rao, S. (2004). SESAME European research project. SESAME: Site EffectS Assessment Using Ambient Excitations, D23.12(December), 62 pp.

Bilondatu, A., Londa, T., & Bujung, C. (2021). Distribusi Suhu Bawah Permukaan Manifestasi Panas Bumi Untuk Analisis Gradien Suhu Di Bukit Kasih Kanonang. Jurnal FisTa : Fisika Dan Terapannya, 2(2), 61–65. https://doi.org/10.53682/fista.v2i2.130

Darma, Y., & Pujiastuti, D. (2021). Analisis Multi-Atribut Dan Jaringan Syaraf Tiruan Dengan Optimasi Filter Untuk Deteksi Patahan Pada Penampang Seismik Lapangan Penobscot Kanada. Jurnal Fisika Unand, 10(3), 364–370. https://jfu.fmipa.unand.ac.id/index.php/jfu/article/view/708

Diah, C. A., Setiawan, B., & Putra, H. S. (2024). Penentuan zona prospek hidrokarbon menggunakan metode passive seismic pada daerah Kecamatan Langsa Baro, Kota Langsa. Acta Geoscience, Energy, and Mining, 3(1), 21–25. https://jurnal.usk.ac.id/JAG/article/view/36741

Fahmi, F., Daud, Y., Suwardi, B. N., Zarkasyi, A., Sugiyanto, A., & Suhanto, E. (2015). 3-D Inversion of Magnetotelluric Data in Kepahiang Geothermal System, Bengkulu. Proceedings Indonesia International Geothermal Convention & Exhibition 2015, 3–8. https://www.newquest-geotechnology.com/pdf.php?file=download/paper/20150807.pdf

Firdasari, A. (2018). Geologi dan Karakteristik Petrografi Batuan Vulkanik Formasi Hulusimpang Daerah Temdak dan Sekitarnya, Kabupaten Kepahiang, Provinsi Bengkulu. Universitas Sriwijaya.

Fransiska, L. (2019). Peran Perguruan Tinggi Dalam Penanggulangan Bencana Di Indonesia. Journal Pendekatan Multidisiplin Ilmu Dalam Manajemen Bencana, Volume 1, 5. https://prosiding.respati.ac.id/index.php/PSN/article/view/47

García-Jerez, A., Piña-Flores, J., Sánchez-Sesma, F. J., Luzón, F., & Perton, M. (2016). A Computer Code For Forward Calculation And Inversion Of The H/V Spectral Ratio Under The Diffuse Field Assumption. Computers and Geosciences, 97, 67–78. https://doi.org/10.1016/j.cageo.2016.06.016

Hadi, A. I., Refrizon, R., Halauddin, H., Lidiawati, L., & Edo, P. (2021). Interpretasi Tingkat Kekerasan Batuan Bawah Permukaan di Daerah Rawan Gempa Bumi Kota Bengkulu. Indonesian Journal of Applied Physics, 11(1), 11–24. https://doi.org/10.13057/ijap.v11i1.46525

Hutami, H. Y., Fitriyani, F., Priniarti, T. L., & Handoyo, H. (2020). Analisis Model Kecepatan Gelombang-P pada Coal-Seam Gas Studi Kasus Cekungan Sumatera Selatan, Indonesia. JGE (Jurnal Geofisika Eksplorasi), 6(2), 113–120. https://doi.org/10.23960/jge.v6i2.74.

Indrayati, A., & Setyaningsih, W. (2017). Mengungkap Potensi Kabupaten Rembang Sebagai Geowisata Dan Laboratoriun Lapangan Geografi. Jurnal Geografi : Media Informasi Pengembangan Dan Profesi Kegeografian, 14(1), 1–17. https://journal.unnes.ac.id/nju/JG/article/view/9773

Kamil, I. (2020). Pemodelan Struktur Kecepatan Seismik Gelombang P (Vp), Kecepatan Seismik Gelombang S (Vs) Dan Vp/Vs Pada Daerah Vulkanik Kabupaten Tanggamus Berdasarkan Tomografi Seismik Menggunakan Data Microearthquake (Meq) Desember 1992 – Februari 1993. Institut Teknologi Sumatera.

Nurwidyanto, M. I., Zainuri, M., Wirasatrya, A., & Yuliyanto, G. (2023). Struktur Bawah Permukaan Pantai Semarang berdasarkan Metode HVSR. Indonesian Journal of Applied Physics, 13(1), 117–127. https://doi.org/10.13057/ijap.v13i1.66864

Ratag, A. S., Bujung, C. A. N., Tumimomor, F., & Polii, J. (2022). Analisis Tipe Fluida Mata Air Panas Berdasarkan Diagram Cl-SO4-HCO3 di Desa Pinaesaan Kabupaten Minahasa Selatan. Jurnal FisTa: Fisika dan Terapannya, 3(2), 1–7. http://dx.doi.org/10.53682/fista.v3i2.206

Purnomo, S. S. (2019). Analisis Struktur Bawah Permukaan Kota Surakarta Bagian Timur Berdasarkan Nilai Kecepatan Gelombang Geser dengan Metode Ellipticity Curve. Universitas Sebelas Maret.

Raharjo, S. A., Saputra, A. V., & Rahadinata, T. (2022). Identifikasi Struktur Geologi Bawah Permukaan Berdasarkan Pemodelan 3D Data Gravitasi (Studi Kasus Daerah Potensi Panas Bumi Kepahiang). Jurnal Teras Fisika, 5(2), 28–35. https://doi.org/10.20884/1.jtf.2022.5.2.7248

Ramadhan, M. I., & Massinai, M. A. (2022). Analysis of Subsurface Layers using the Multichannel Analysis of Surface Waves Method in Manimbahoi, Gowa Regency. Jurnal Geocelebes, 6(2), 126–134. https://doi.org/10.20956/geocelebes.v6i2.22025

Rasimeng, S., Pratama, T. P. E., & Wibowo, R. C. (2024). Structural Geology Identification based on Derivative Analysis Gravity Data in Tangkuban Perahu Mountain. Journal of Engineering and Scientific Research, 6(1), 7–15. https://doi.org/10.23960/jesr.v6i1.163

Risa, I. N., Maison, M., & Dewi, I. K. (2023). Analisis Kerentanan Tanah Berdasarkan Pengukuran Mikrotremor Di Desa Jati Mulyo, Tanjung Jabung Timur. JGE (Jurnal Geofisika Eksplorasi), 9(1), 18–31. https://doi.org/10.23960/jge.v9i1.236

Setianegara, R., Muslim, D., Ismawan, I., & Marjiyono, M. (2023). Potensi Penguatan Gelombang Gempabumi oleh Sedimen Permukaan Berdasarkan Analisis Mikrotremor: Studi Kasus di Cekungan Bandung Bagian Selatan. Jurnal Geologi dan Sumberdaya Mineral, 24(2), 107–115. https://doi.org/10.33332/jgsm.geologi.v24i2.749

Setyowati, Y., Farid, M., Hadi, A. I., Helinnes, P., Refrizon, R., Hardiansyah, D., Gumanty, U., Raihana, H., Al-Ansory, A. R., Syah, M. T. (2024). Subsurface Sediment Layer Analysis at the Dendam Tak Sudah Lake Flyover Construction Site in Bengkulu City Using the HV-Inv Method. Jurnal Ilmu Fisika | Universitas Andalas, 16(2), 187–197. https://doi.org/10.25077/jif.16.2.187-197.2024

Sihombing, P. A., Hadi, A. I., Refrizon, R., & Zakariya, H. (2024). Identification of the distribution of geothermal reservoirs around Kepahiang Bengkulu Province using GGMPlus gravity data anomalies by the 2D inversion method. Journal of Aceh Physics Society, 13(1), 1–8. https://doi.org/10.24815/jacps.v13i1.37642

Sihombing, R. B., & Rustadi, R. (2018). Pemodelan dan Analisa Struktur Bawah Permukaan Daerah Prospek Panasbumi Kepahiang Berdasarkan Metode Metode Gayaberat. Jurnal Geofisika Eksplorasi, 4(2), 159–172. https://doi.org/10.23960/jge.v4i2.14.

Simbolon, P., Refrizon, R., & Sugianto, N. (2020). Peta Sebaran Intensitas Anomali Magnetik Di Daerah Prospek Geothermal Kepahiang Berdasarkan Survei Metode Geomagnet. Newton-Maxwell Journal of Physics, 1(1), 7–12. https://doi.org/10.33369/nmj.v1i1.14290

Wibowo, N. B., & Huda, I. (2020). Analysis of Amplification, Seismic Vulnerability Index And Soil Clasification Based On Vs30 In Yogyakarta. Buletin Meteorologi, Klimatologi, Dan Geofisika, 1(2), 21–31.

Yogaswara, A. R. D., & Kuncahyani, A. (2024). Analisis Mikrotremor Berbasis Metode HVSR Untuk Mengetahui Indeks Kerentanan Seismik Di Wilayah Kabupaten Kulonprogo. Jurnal Stasiun Geofisika Sleman, 2(1), 14–20. https://jurnal.stageofsleman.id/index.php/jsgs/article/view/14

Downloads

Published

2025-10-01

How to Cite

Rabbani, M. R., Hadi, A. I., Harlianto, B., Farid, M., Raihana, H., & Anggi, A. P. (2025). HVSR Microtremor Analysis to Assess Subsurface Fault Characteristics and Geothermal Potential in Kepahiang. JURNAL GEOCELEBES, 9(2), 157–170. https://doi.org/10.70561/geocelebes.v9i2.43347

Issue

Vol. 9 No. 2: October 2025

Section

Articles

License

Copyright (c) 2025 JURNAL GEOCELEBES

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).