Seismic microzonation and geotechnical characteristics of Manna City, South Bengkulu
Abstract
As one of the disaster-prone areas in Manna, this city is prone to disasters. This study aims to evaluate the potential risk of earthquakes in Manna through a seismic microzonation approach. Using amplification factor and dominant frequency data, this study produced a microzonation map showing areas with a higher risk of earthquake damage. The methods applied in this study include the Horizontal-to-Vertical Spectral Ratio (HVSR) and Multichannel Analysis of Surface Waves (MASW), which enable analysis of soil properties and their influence on earthquake vibration amplification. The study results reveal that areas with soft soil and high amplification, such as Pasar Manna and Pino Raya, are at higher risk of significant damage during an earthquake. Based on these findings, we recommend mitigation measures such as spatial planning that considers seismic risk, the implementation of earthquake-resistant construction, and enhancing community preparedness. By integrating these microzonation results into development policies and disaster mitigation strategies, it is hoped that the city of Manna can reduce the potential damage caused by earthquakes.
Keywords
Full Text:
PDFReferences
J. Žalohar, “What causes earthquakes?,” in Geohazards and Risks Studied from Earth Observations, Elsevier, 2018, pp. 179–190, doi: 10.1016/B978-0-12-814580-7.00015-0.
L. Z. Mase, Refrizon, Rosiana, and P. W. Anggraini, “Local site investigation and ground response analysis on downstream area of Muara Bangkahulu River, Bengkulu City, Indonesia,” Indian Geotech. J., vol. 51, no. 5, pp. 952–966, Oct. 2021, doi: 10.1007/s40098-020-00480-w.
R. Misliniyati, L. Z. Mase, A. J. Syahbana, and E. Soebowo, “Seismic hazard mitigation for Bengkulu coastal area based on site class analysis,” IOP Conf. Ser.: Earth Environ. Sci., vol. 212, no. 1, pp. 1–10, Dec. 2018, doi: 10.1088/1755-1315/212/1/012004.
L. Z. Mase, “A note of ground motion interpretation and site response analysis during the 2007 Bengkulu–Mentawai earthquakes, Indonesia,” Arab. J. Geosci., vol. 14, no. 2, pp. 1–12, Jan. 2021, doi: 10.1007/s12517-020-06344-0.
R. Jena, A. Shanableh, R. Al-Ruzouq, and B. Pradhan, “Earthquake spatial probability and hazard estimation using various explainable AI (XAI) models at the Arabian peninsula,” Remote Sens. Appl.: Soc. Environ., vol. 31, Aug. 2023, Art. no. 101004, doi: 10.1016/j.rsase.2023.101004.
L. Z. Mase, S. Likitlersuang, T. Tobita, S. Chaiprakaikeow, and S. Soralump, “Local site investigation of liquefied soils caused by earthquake in Northern Thailand,” J. Earthq. Eng., vol. 24, no. 7, pp. 1181–1204, Jul. 2020, doi: 10.1080/13632469.2018.1469441.
A. K. Jamal Eddine, L. Lenti, and J. F. Semblat, “Vibrations in soils: A spectral prediction method,” Procedia Eng., vol. 199, pp. 2675–2680, 2017, doi: 10.1016/j.proeng.2017.09.546.
E. Kapogianni, P. N. Psarropoulos, and D. Kokoris, “Impact of local site conditions on the seismic response of the Athenian Acropolis Hill,” Geotech. Geol. Eng., vol. 39, no. 3, pp. 1817–1830, Mar. 2021, doi: 10.1007/s10706-020-01589-8.
F. L. Bonali and N. Tsereteli, Building Knowledge for Geohazard Assessment and Management in the Caucasus and Other Orogenic Regions. Springer, 2021.
S. Hailemikael, S. Amoroso, and I. Gaudiosi, “Guest editorial: Seismic microzonation of Central Italy following the 2016–2017 seismic sequence,” Bull. Earthq. Eng., vol. 18, no. 12, pp. 5415–5422, Oct. 2020, doi: 10.1007/s10518-020-00929-6.
I. Novtrisa, L. Z. Mase, R. Refrizon, R. Misliniyati, and Amri, “Studi mikrozonasi kerentanan seismik dan bangunan bertingkat menggunakan metode HVSR (Horizontal to Vertical Spectral Ratio) di Kabupaten Bengkulu Selatan,” J. Fis. Flux, vol. 21, no. 3, pp. 241–254, Jan. 2025, doi: 10.20527/flux.v21i3.19616.
M. A. Arrahman, A. Tohari, and C. A. Perwita, “Seismic microzonation for Lembang fault hazard area in West Bandung Regency based on microtremor measurement,” IOP Conf. Ser.: Earth Environ. Sci., vol. 1288, no. 1, pp. 1–8, Dec. 2023, doi: 10.1088/1755-1315/1288/1/012018.
K. Sieh and D. Natawidjaja, “Neotectonics of the Sumatran fault, Indonesia,” J. Geophys. Res.: Solid Earth, vol. 105, no. B12, pp. 28295–28326, Dec. 2000, doi: 10.1029/2000JB900120.
L. Z. Mase, “Seismic hazard vulnerability of Bengkulu City, Indonesia, based on deterministic seismic hazard analysis,” Geotech. Geol. Eng., vol. 38, no. 5, pp. 5433–5455, Oct. 2020, doi: 10.1007/s10706-020-01375-6.
R. S. Saragih, R. Refrizon, and A. I. Hadi, “Identification of subsurface structures in South Bengkulu Manna City based on the MASW method,” Indonesian Phys. Rev., vol. 6, no. 3, pp. 306–323, Sep. 2023, doi: 10.29303/ipr.v6i3.244.
M. I. Seht and J. Wohlenberg, “Microtremor measurements used to map thickness of soft sediments,” Bull. Seismol. Soc. Amer., vol. 89, no. 1, pp. 250–259, Feb. 1999.
P. M. Shearer, Introduction to Seismology, 2nd ed. Cambridge, UK: Cambridge Univ. Press, 2009.
Y. Nakamura, “Clear identification of fundamental idea of Nakamura’s technique and its applications,” in Proc. 12th World Conf. Earthquake Eng., Auckland, New Zealand, 2000, pp. 1–8.
D. I. Fadli, I. A. Awaliyah, A. I. Hadi, M. Farid, A. J. Akbar, and R. Refrizon, “Microzonation site effects and shear strain during earthquake-induced landslide using HVSR measurement in Ulu Mana Sub-District, South Bengkulu Regency, Indonesia,” J. Penelit. Pendidik. IPA, vol. 9, no. 2, pp. 592–599, Feb. 2023, doi: 10.29303/jppipa.v9i2.2961.
P. Harutoonian, C. J. Leo, K. Tokeshi, and T. Doanh, “Investigation of dynamically compacted ground by HVSR-based approach,” Soil Dyn. Earthq. Eng., vol. 46, pp. 20–29, Mar. 2013, doi: 10.1016/j.soildyn.2012.12.004.
Refrizon, D. I. Fadli, O. P. Triutami, and N. Rahmawati, “Microzonation analysis in Manna City & Pasar Manna Sub-districts utilizing microtremor data, South Bengkulu Regency,” Indonesian Phys. Rev., vol. 7, no. 1, pp. 83–92, Jan. 2024, doi: 10.29303/ipr.v7i1.252.
J. Kristek, P. Moczo, P. Y. Bard, F. Hollender, and S. Stripajová, “Computation of amplification factor of earthquake ground motion for a local sedimentary structure,” Bull. Earthq. Eng., vol. 16, no. 6, pp. 2451–2475, Jun. 2018, doi: 10.1007/s10518-018-0358-0.
M. K. Talukder, P. Rosset, and L. Chouinard, “Reduction of bias and uncertainty in regional seismic site amplification factors for seismic hazard and risk analysis,” GeoHazards, vol. 2, no. 3, pp. 277–301, Sep. 2021, doi: 10.3390/geohazards2030015.
A. F. Kamarudin, M. H. Zainal Abidin, S. N. Mokhatar, and M. E. Daud, “Identification of natural frequency of low rise building on soft ground profile using ambient vibration method,” J. Phys.: Conf. Ser., vol. 995, no. 1, pp. 1–8, Apr. 2018, doi: 10.1088/1742-6596/995/1/012100.
B. S. S. Council, “FEMA 302a - 2019 Edition NEHRP recommended provisions for seismic regulations for new buildings,” Federal Emergency Management Agency, Washington, DC, USA, Rep. FEMA 302a, 2019.
U. N. Prabowo, S. Sehah, and A. Ferdiyan, “Estimasi ketebalan lapisan sedimen permukaan menggunakan pengukuran mikrotremor di Pemalang, Jawa Tengah,” J. Teras Fis., vol. 4, no. 1, pp. 187–183, Jun. 2021, doi: 10.20884/1.jtf.2021.4.1.3436.
Supriyadi, Khumaedi, Sugiyanto, A. R. Fadilah, and W. H. Muttaqin, “Study of the subsurface structure based on microseismic data in the heritage area of Kota Lama Semarang, Indonesia,” Int. J. GEOMATE, vol. 23, no. 97, pp. 211–219, Sep. 2022, doi: 10.21660/2022.97.j2357.
L. Z. Mase, T. Tobita, and S. Likitlersuang, “Amplification characteristics and local site effects in Bengkulu City, Indonesia, based on microtremor measurements,” J. Earthq. Eng., vol. 25, no. 6, pp. 1078–1099, Jun. 2021, doi: 10.1080/13632469.2019.1577760.
A. V. H. Simanjuntak, Y. Asnawi, M. Umar, S. Rizal, and M. Syukri, “A microtremor survey to identify seismic vulnerability around Banda Aceh using HVSR analysis,” Elkawnie, vol. 6, no. 2, pp. 342–355, Dec. 2020, doi: 10.22373/ekw.v6i2.7886.
L. Z. Mase, “Site-specific seismic ground response analysis for Bengkulu City, Indonesia,” Geomech. Geoeng., vol. 16, no. 4, pp. 287–301, Jul. 2021, doi: 10.1080/17486025.2019.1657099.
DOI: http://dx.doi.org/10.62870/tjst.v21i1.32748
Refbacks
- There are currently no refbacks.
Copyright (c) 2025 Teknika: Jurnal Sains dan Teknologi

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Teknika: Jurnal Sains dan Teknologi is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.