Indeks Kerentanan Seismik Daerah Perbukitan dan Pemukiman di Bukit Nobita Kota Padang Menggunakan Data Mikrotremor
DOI:
https://doi.org/10.25077/jfu.13.4.511-517.2024Keywords:
Seismic vulnerability index, Dominant frequency, amplification, HVSRAbstract
Research on the seismic vulnerability index on Nobita Hill, Padang City uses the microtremor method. The study was conducted in two areas, namely hilly and residential areas around Nobita Hill. Measurements were carried out using a geophone with three components, a north-south horizontal component, an east-west horizontal component and an up-down vertical component at 7 points in hilly areas and 9 points in residential areas with a recording duration of 30 minutes. The measurement results were then processed using the Horizontal Vertical Spectral Ratio (HVSR) method using Geopsy software and mapped using Surfer 11. The research results show that the Nobita Hill area and the settlements around the hill are not vulnerable to seismicity because both research areas have a small category of seismic vulnerability index. This is characterized by dominant frequency values in the hills ranging from 0.633 - 0.935 Hz, amplification from 0.905 - 1.306, and seismic vulnerability index from 1.234 - 2.622. In residential areas, dominant frequency values
were found ranging from 0.645 - 2.983 Hz, amplification from 1.109 - 1.316, and seismic vulnerability index from 0.438 - 1.974. This indicates that both studies are safe in the event of an earthquake.
References
Annisa, N., & Pohan, A. F. (2023). Evaluasi Kondisi Jembatan Kuranji dengan Metode Horizontal To Vertical Spectral Ratio dan Pergerakan Partikel. Jurnal Fisika Unand, 12(3), 381-387.
Arif, M., Pujiastuti, D., & Pohan, A. F. (2024). Pemodelan 3D Bidang Gelincir Tanah Longsor Menggunakan Metode Geolistrik di Bukit Nobita Padang. Jurnal Fisika Unand, 13(1), 15-21.
Asri, W., Suharno, S., & Rustadi, R. (2018). Pemetaan mikrozonasi daerah rawan gempabumi menggunakan metode hvsr daerah painan sumatera barat. Jurnal Geofisika Eksplorasi, 4(1), 31-45.
BMKG. (1998). Sumberdaya Geologi, Buletin Meteorologi dan Geofisika, No 4.
Brigham, E. O. (1988). The fast Fourier transform and its applications. Prentice-Hall, Inc.
Fadillah, A., & Budiman, A. (2023). Identifikasi Pola Redistribusi Tanah Untuk Pendugaan Erosi Berdasarkan Nilai Suseptibilitas Magnetik di Daerah Bukit Nobita Kota Padang. Jurnal Fisika Unand, 12(4), 639-645.
Fäh, D., Kind, F., & Giardini, D. (2001). A theoretical investigation of average H/V ratios. Geophysical Journal International, 145(2), 535-549.
Fauziah, L., & Pohan, A. F. (2023). Identifikasi Potensi Longsor di Kota Sawahlunto dengan Menggunakan Parameter Frekuensi Dominan, Amplifikasi, dan Kecepatan Gelombang Geser. Jurnal Fisika Unand, 12(3), 342-348.
Irham, M. N., Zainuri, M., Yuliyanto, G., & Wirasatriya, A. (2021). Measurement of ground response of Semarang coastal region risk of earthquakes by Horizontal To Vertical Spectral Ratio (HVSR) microtremor method. Journal of Physics: Conference Series, 1943(1), 12033.
Kumar, S., Singh, P., Sushil, R., Singh, P., & Tiwari, A. (2021). Microtremor measurement to evaluate site characteristics by horizontal to vertical spectral ratio technique in Sikkim, Northeast Himalayas, India. Quaternary International, 585, 134-142.
Latue, P. C., Sihasale, D. A., & Rakuasa, H. (2023). Pemetaan Daerah Potensi Longsor di Kecamatan Leihitu Barat, Kabupaten Maluku Tengah, Menggunakan Metode Slope Morphology (SMORPH). INSOLOGI: Jurnal Sains Dan Teknologi, 2(3), 486-495.
Lestari, F. P., Pujiastuti, D., & Arifin, H. (2016). Analisis Indeks Kerentanan Tanah di Wilayah Kota Padang (Studi Kasus Kecamatan Padang Barat dan Kuranji). Jurnal Fisika Unand, 5(1), 42-46.
Nakamura, Y. (1989). A method for dynamic characteristics estimation of subsurface using microtremor on the ground surface. Railway Technical Research Institute, Quarterly Reports, 30(1).
Ratdomopurbo, A., Subandriyo, S. Y., & Suharna. (2008). Pedoman Pemetaan Mikrozonasi, Badan Geologi Dapertemen Energi dan Sumberdaya Mineral. Dapertemen Energi Dan Sumberdaya Mineral.
Refrizon, R., Hadi, A. I., Lestari, K., & Oktari, T. (2013). Analisis Percepatan Getaran Tanah Maksimum dan Tingkat Kerentanan Seismik Daerah Ratu Agung Kota Bengkulu. Prosiding SEMIRATA 2013, 1(1).
Saaduddin, Sismanto, & Marjiyono. (2015). Pemetaan Indeks Kerentanan Seismik Kota Padang Sumatera Barat dan Korelasinya Dengan Titik Kerusakan Gempabumi 30 September 2009. Seminar Nasional Kebumian Ke-8, Universitas Gajah Mada.
Tohari, A., & Wardhana, D. D. (2018a). Mikrozonasi seismik wilayah Kota Padang berdasarkan pengukuran mikrotremor. RISET Geologi Dan Pertambangan, 28(2), 205-220.
Tohari, A., & Wardhana, D. D. (2018b). Seismic Microzonation of Padang City Based On Microtremor Measurements. Riset Geologi Dan Pertambangan, 28(2), 205-220.
Wafa, A., & Astuti, E. S. (2016). Pemetaan Daerah Rawan Longsor Berbasis GIS di Kota Batu. Jurnal Informatika Polinema, 2(4), 144.
Yassar, M. F., Nurul, M., Nadhifah, N., Sekarsari, N. F., Dewi, R., Buana, R., Fernandez, S. N., & Rahmadhita, K. A. (2020). Penerapan Weighted Overlay Pada Pemetaan Tingkat Probabilitas Zona Rawan Longsor di Kabupaten Sumedang, Jawa Barat. Jurnal Geosains Dan Remote Sensing, 1(1), 1-10.
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