Analysis of Soil Vulnerability Level Due to Earthquake in Tarutung Region and Its Surroundings Using Probabilistic Seismic Hazard Analysis Method

Nindya Mirandani Pratiwi, Lailatul Husna Lubis, Ratni Sirait Sirait, Reinhard Sipayung Sipayung

Abstract


The geotectonic and geological conditions of the Tarutung region, which is crossed by the active Renun and Toru fault lines, cause the region to experience frequent earthquakes. Determination of the maximum ground acceleration (PGA) value is a very important method to see the vulnerability of the soil due to earthquakes in the region. This research uses the PSHA method with a probability of exceeding 2% PE for 50 years or a return period of 2500 years. The data used is earthquake data with a magnitude of 4.3 - 6.4 Mw and a depth of 10 - 250 km starting from 1971 - 2022. This data was obtained from two sources, namely the IRIS catalog and data from BMKG Geophysical Station Class I Deli Serdang. The vulnerability analysis obtained changes the value of peak ground acceleration in bedrock at the condition of T = 0 s (PGA), T = 0.2 s (short period), and T = 1 (long period) with a probability of exceeding 2% in 50 years in bedrock. The results of this study obtained maximum ground acceleration values of 0.3 g - 0.9 g for PGA (T = 0 s), 0.4 g - 0.9 g for a short period (T = 0.2 s), 1.0 g - 1.2 g for long period (T = 1 s). Areas with the highest ground acceleration values are located in Pahe Julu District, Pahae Jae District, and Simangumban District


Keywords


peak ground acceleration, PSHA, Renun and Toru fault

References


Abdillah. (2010). Analisis Keaktifan Dan Resiko Gempa Bumi Pada Zona Subduksi Daerah Pulau Sumatera Dan Sekitarnya Dengan Metode Least Square. In Skripsi. Pp. 1–69

Alabi, A.A., Akinyen, O.D., Adewale, A. 2013. Seismicity Pattern in Southern Africa From 1986 to 2009. Canadian Center of Science and Education. Canada.

Asna. (2017). Pemetaan Daerah Rawan Bencana GempaBumi di Wilayah Sulawesi Tenggara Berdasarkan Nilai Percepatan Tanah Maksimum Dengan Menggunakan Metode Mc.Guirre R.K. Makassar: UIN Allauddin Makasar.

Chandler, A.M., & Mendis, P.A. (2000). Performance of reinforced concrete frames using force and displacement based seismic assesment method. Engineering, Structures. 22, 352-363.

Gustin, Arif. (2009). Analisa Percepatan Tanah Maksimum Wilayah Pulau Sumatera Dan Sekitarnya Dengan Metode Mc.Guire R.K. Skripsi. Akademi Meteorologi Dan Geofisika.

Jimmy Nugraha, Guntur Pasau, Bambang Sunardi, Sri Widiyantoro, 2014. Analisis Hazard Gempa dan Isoseismal untuk Wilayah Jawa-Bali-NTB. Jurnal Meteorologi dan Geofisika.

Kirbani, Sri Brotopuspito, Tiar Prasetya dan Ferry Markus Widigdo, 2006. Perecepatan Getaran Tanah Maksimum Daerah Istimewa Yogyakarta 1943 – 2006. Jurnal Geofisika v.1/2006, Yogyakarta: Himpunan Ahli Geofisika Indonesia (HAGI).

Medchar, M.S., & Kennedy, D.J.L. (2000). Displacement-based seismic design of buildings-theory. Engineering Structures. 2, 201-209.

Pasau, Guntur, And Adey Tanauma. (2015). Sulawesi Menggunakan Data Hiposenter Resolusi Tinggi Sebagai Upaya Mitigasi Bencana. Jurnal Fisika Dan Aplikasinya. 6–10

Rupana dan Mara Bangun Harahap. (2017). Daerah Rawan Akibat Gempa Bumi Kabupaten Karo Berdasarkan Percepatan Tanah Maksimum Dengan Metode MCGuire R.K. Jurnal Einstein. Issn:2407-747.

Sieh, K & Natawidjaja, D. (2000). Neotectonics of the Sumatran fault, Indonesia. Journal of Geophysical Research. 105,28,295-28,236.

Sunardi, Bambang. (2015). Percepatan Tanah Sintetis Kota Yogyakarta Berdasarkan Deagregasi Bahaya Gempa. Jurnal Lingkungan Dan Bencana Geologi. 211–2.

Supendi, Pepen, dkk. (2022). Analisis Gemabumi Tarutung (Sumatera Utara) Mw 5.8 Tanggal 1 Oktober 2022. Jakarta.

Toban, Eunike Else. (2017). Studi Percepatan Tanah Maksimum Menggunakan Metode Probabilistic Seismic Hazard Analysis (Psha) Di Kabupaten Bone Sulawesi Selatan. In Skripsi Geofisika. Pp. 1–78

Windiyanti, Agnes Cahaya, Karyanto, Rustadi, And Rudianto. (2017). Analisis Zona Rawan Gempabumi Daerah Lampung Berdasarkan Nilai Percepatan Tanah Maksimum (Pga) Dan Data Accelererograph Tahun 2008-2017. Jurnal Geofisika Eksplorasi.




DOI: http://dx.doi.org/10.20527/flux.v21i1.17157

Article Metrics

Abstract view : 301 times
PDF (Bahasa Indonesia) - 291 times

Refbacks

  • There are currently no refbacks.


Copyright (c) 2024 Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat

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

Association with:

Physical Society of Indonesia

Indexed by:

 

Creative Commons License
Jurnal Fisika FLux: Jurnal Ilmiah FMIPA Universitas Lambung Mangkurat is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.