Identifikasi Nilai Indeks Kerentanan Seismik Berdasarkan Pengukuran Mikrotremor di Wilayah Alahan Panjang, Sumatra Barat
DOI:
https://doi.org/10.26418/pf.v13i2.81639Keywords:
Indeks kerentanan seismik, Horizontal-to-Vertical Spectral Ratio, MikrotremorAbstract
Penelitian ini bertujuan untuk mengidentifikasi indeks kerentanan seismik di wilayah Alahan Panjang, Provinsi Sumatra Barat, dengan analisis mikrotremor menggunakan metode Horizontal-to-Vertical Spectral Ratio (HVSR). Wilayah Alahan Panjang dikenal sebagai salah satu daerah yang rentan terhadap gempa bumi di Indonesia. Analisis mikrotremor digunakan untuk menilai karakteristik dinamis tanah secara lokal, hal ini merupakan elemen penting dalam menentukan seberapa rentan suatu daerah terhadap gempa. Metode ini juga digunakan untuk menciptakan indeks kerentanan seismik dengan mempertimbangkan parameter-parameter seperti frekuensi dominan (f0) dan faktor amplifikasi (A0) di lokasi tersebut. Untuk mengkaji lebih lanjut, dilakukan pengukuran mikrotremor di Alahan panjang dengan 29 titik pengukuran. Hasil penelitian menunjukkan distribusi indeks kerentanan seismik di wilayah Alahan Panjang, didapat rentang nilai KG 1,00-19,787. Daerah dengan indeks kerentanan seismik rendah (KG < 5) terletak di wilayah perbukitan dengan elevasi tinggi, sedangkan daerah dengan indeks kerentanan seismik tinggi (KG > 5) tersebar di beberapa wilayah topografi rendah.
References
Sieh, K., and D. Natawidjaja (2000), Neotectonics of the Sumatran fault, Indonesia, J. Geophys. Res., 105(B12), 28295–28326, doi:10.1029/2000JB900120.Sutasurya, L. A. and Riyanto, B., Title of Paper, Name of Journal, 8(4), 20-25, 1999. [cited from journal]
Karim, S., 2011, Geografi Sumatera Barat dan Bencana Alam Gempa Bumi.
Arifin, S. S. ,2014, Penentuan Zona Rawan Guncangan Bencana Gempa Bumi Berdasarkan Analisis Nilai Amplifikasi HVSR Mikrotremor dan Analisis Periode Dominan Daerah Liwa dan Sekitarnya. JGE (Jurnal Geofisika Eksplorasi), 2(01), 30-40.
Alihudien, A., 2015, Analisis Amplifikasi dan Frekuensi Natural Tanah Setempat dalam Pembuatan Mikrozonasi Gempa Bumi (Studi Kasus Kecamatan Sumbersari, Kabupaten Jember).
Nakamura, Y., 1997, Seismic Vulnerability Indices For Ground And Structures Using Microtremor, World Congress on Railway Research, Florence, Nov.
Sungkono, B. J., 2011, Karakterisasi Kurva Horizontal-To-Vertical Spectral Ratio: Kajian Literatur Dan Permodelan, Jurnal Neutrino: Jurnal Fisika dan Aplikasinya.
Amrullah, T S., 2018, Aplikasi Metode Horizontal to Vertical Spectral Ratio (HVSR) untuk Analisis Struktur Bawah Permukaan Tanah Pada Zona Amblesan Studi Kasus Perumahan Tanah Mas Kota Semarang, (Skripsi).
Wibowo, N. B., & Huda, I. (2020). Analisis Amplifikasi, Indeks Kerentanan Seismik Dan Klasifikasi Tanah Berdasarkan Distribusi Vs30 DI Yogyakarta. Buletin Meteorologi, Klimatologi, Dan Geofisika, 1(2), 21-31.
Cipta, A., Afif, H., Pradipto, M. A. J., Omang, A., & Solikhin, A., 2023, Optimizing HVSR Curves, Slope and Geologic Information for Vs30 and Seismic Vulnerability Zoning in Nakamura, Y., 1989, A method for dynamic characteristics estimation of subsurface using microtremor on the ground surface, Tokyo: Quarterly Reports of the Railway TechnicalResearch Institute. Likupang. Jurnal Lingkungan dan Bencana Geologi Vol, 14(1), 1-8.
Nakamura, Y., 1989, A method for dynamic characteristics estimation of subsurface using microtremor on the ground surface, Tokyo: Quarterly Reports of the Railway TechnicalResearch Institute.
SESAME, 2004, Site Effects Assessment Using Ambient Excitations, European Commission – Research General Directorate Project No. EVG1-CT-2000-00026 SESAME, Report of the WP04 H/V Technique : Empirical Evaluation.
Nakamura. Y., 2000, Clear Identification ofFundamental Ideas of Nakamura’sTechnique and Its Application, Japan:Tokyo University.
Downloads
Additional Files
Published
Issue
Section
License
Copyright Notice using Creative Commons License for an Online Journal
The online journal Prisma Fisika operates under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0). This copyright notice serves to inform authors, readers, and users of the terms and conditions regarding the use and distribution of the journal's content. By submitting or accessing the content, you agree to the following:
1. Content License:
a. All articles, images, and supplementary materials published in Prisma Fisika are licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
b. This license permits users to copy, distribute, and adapt the content for non-commercial purposes, provided appropriate credit is given to the original authors and the journal.
c. If you remix, transform, or build upon the content, you must distribute your contributions under the same license as the original.
2. Attribution:
a. When using or sharing content from Prisma Fisika, you must properly attribute the original authors and the journal.
b. Include the title of the article, the names of all authors, Prisma Fisika, the year of publication, the volume/issue number, and the specific page numbers.
c. Provide a hyperlink to the original article on Prisma Fisika's website, if applicable.
3. Non-Commercial Use:
a. The content published in Prisma Fisika may not be used for commercial purposes without obtaining explicit permission from the copyright holders.
b. Commercial use includes, but is not limited to, reproduction or distribution of the content for financial gain, selling or licensing the content, or using the content in products or services that are sold or monetized.
4. ShareAlike:
a. If you adapt or remix the content from Prisma Fisika, you must distribute your derivative work under the same Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
b. This provision ensures that any modifications, adaptations, or remixes of the content maintain the same open licensing framework.
5. Disclaimer:
a. The views expressed in articles published in Prisma Fisika are solely those of the authors and do not necessarily reflect the opinions or policies of the journal, its editorial board, or affiliated institutions.
b. Prisma Fisika and its editors are not liable for any errors, omissions, or damages arising from the use or interpretation of the published content.
Please note that this Copyright Notice does not supersede any additional permissions or restrictions that may be granted by individual authors or copyright holders for their specific content within Prisma Fisika. For any questions or requests regarding the use of the journal's content, please contact the editorial team at prismafisika@physics.untan.ac.id.
By accessing or contributing to Prisma Fisika, you agree to comply with the terms of this Creative Commons license. Violation of these terms may result in legal consequences as governed by applicable copyright laws.
Date: 24-05-2023
Prisma Fisika
Email: prismafisika@physics.untan.ac.id
