MICRO-ZONATION STUDY OF POTENTIAL SEISMIC HAZARDS BASED ON PEAK GROUND ACCELERATION (PGA) VALUE IN THE NORTH KONAWE OFFICE AREA
DOI:
https://doi.org/10.22437/jop.v8i1.20232Keywords:
Earthquake, Geopsy, HVSR, Microzonation, PGAAbstract
The purpose of this study was to determine the potential for seismic hazard based on the peak ground acceleration value in the North Konawe office area. This study uses the HVSR method to obtain the dominant frequency, amplification factor, dominant period, seismic vulnerability index and Peak Ground Acceleration. The results obtained from the microzonation of the distribution of the dominant frequency value with a high category were found at 5 measurement points, the amplification factor with a low category was found at 1 measurement point, the dominant period with a low category was found at 6 measurement points and the seismic vulnerability index with a low category was found at 5 points. measurement. Overall the research area is included in the level of seismic hazard risk, not high potential but in the low category. While the microzonation of the distribution of PGA values ​​obtained values ​​ranging from 23,2381-23,3231 gal which belong to the low seismic hazard risk level. Where it can be described in this area the earthquake that occurred can be felt by many people but caused damage. The light objects that were hung swayed and the windows shook. So it can be concluded that this research area is included in the category of low seismic hazard level
Downloads
References
Amaliyah, A. R. N. (2017). Studi Tingkat Resiko Bahaya Seismik Berdasarkan Analisis Pengukuran Mikrotremor di Kecamatan Alla Kabupaten Enrekang [Diploma, Universitas Islam Negeri Alauddin Makassar]. http://repositori.uin-alauddin.ac.id/7999/
Anggraeni Putri, Y. D., Budi Wibowo, N., & Darmawan, D. (2016). Mikrozonasi Indeks Kerentanan Seismik Di Kawasan Jalur Sesar Opak Berdasarkan Pengukuran Mikrotremor [Skripsi, Universitas Negeri Yogyakarta]. https://eprints.uny.ac.id/43809/
Anindya Putri, R., Purwanto, M. S., & Widodo, A. (2017). Identifikasi Percepatan Tanah Maksimum (PGA) dan Kerentanan Tanah Menggunakan Metode Mikrotremor Jalur Sesar Kendeng. Jurnal Geosaintek, 3(2), Article 2. https://doi.org/10.12962/j25023659.v3i2.2966
Mase, L. Z., Likitlersuang, S., & Tobita, T. (2021). Ground Motion Parameters and Resonance Effect During Strong Earthquake in Northern Thailand. Geotechnical and Geological Engineering, 39(3), 2207–2219. https://doi.org/10.1007/s10706-020-01619-5
Mukhopadhyay, S., & Bormann, P. (2004). Low cost seismic microzonation using microtremor data: An example from Delhi, India. Journal of Asian Earth Sciences, 24(3), 271–280. https://doi.org/10.1016/j.jseaes.2003.11.005
PERDA Kab. Konawe Utara No. 6 Tahun 2016 tentang Rencana Pembangunan Jangka Menengah Daerah Kabupaten Konawe Utara Tahun 2016-2021 [JDIH BPK RI]. (n.d.). Retrieved 14 February 2022, from https://peraturan.bpk.go.id/Home/Details/56544/perda-kab-konawe-utara-no-6-tahun-2016
Puteri, D. M., Affandi, A. K., Sailah, S., Hudayat, N., & Zawawi, M. K. (2019). Analysis of peak ground acceleration (PGA) using the probabilistic seismic hazard analysis (PSHA) method for Bengkulu earthquake of 1900 – 2017 period. Journal of Physics: Conference Series, 1282(1), 012054. https://doi.org/10.1088/1742-6596/1282/1/012054
Raduan, R., Daud, M. E., & Kaamin, M. (2018). Applications GIS for earthquake threat mapping in Sabah. MATEC Web of Conferences, 250, 07001. https://doi.org/10.1051/matecconf/201825007001
Rehman, A., Song, J., Haq, F., Ahamad, M. I., Sajid, M., & Zahid, Z. (2021). Geo-physical hazards microzonation and suitable site selection through multicriteria analysis using geographical information system. Applied Geography, 135, 102550. https://doi.org/10.1016/j.apgeog.2021.102550
Sompotan, A. F. (2012). Struktur Geologi Sulawesi. Perpustakaan Sains Kebumian, Bandung.
