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All Journal BULETIN FISIKA
I Putu Dedy Pratama
BMKG Stasiun Geofisika Kelas II, Jl. Pulau Tarakan No. 1, Sanglah, Denpasar, Bali, Indonesia
Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Physics

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Penyesuaian Nilai Percepatan Tanah Maksimum Berdasarkan Modifikasi Konstanta Atenuasi dengan Data Accelerograph Tahun 2020-2023 Wilayah Bali Mayumi Cahyandari; Winardi Tjahyo Baskoro; I Putu Dedy Pratama; I Made Yuliara; Hery Suyanto; I Gde Antha Kasmawan
BULETIN FISIKA Vol 25 No 2 (2024): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2024.v25.i02.p12

Abstract

This study aims to determine the empirical formula model of maximum ground acceleration (PGA) in the Bali region by modifying the attenuation constant based on accelerograph data from 2020-2023 obtained from the BMKG Class II Sanglah Geophysical Station. The data used consists of 443 accelerograph recordings from 146 earthquake events, with a coverage area of ??113.51 ° - 115.83 ° E and 12.56 ° - 7.71 ° S. Through linear regression analysis, the empirical PGA model for the Bali region is obtained: log10 PGA = (-1.817) log10 (R) + (0.809) M - 0.089. This model is also compared with the attenuation model from Donovan, Setiawan, and Lin and Wu, with the results showing that the developed model has a very strong correlation of 0.782 between the PGA from observations and the PGA from the model which is included in the very strong category. In addition, the MSE value of 0.209 and RMSE of 0.457 from this model indicate that the model has a good level of accuracy in predicting PGA values. These findings provide a significant contribution in improving seismic risk prediction in the Bali region, which can be used as a basis for more effective disaster mitigation planning.
Co-Authors Hery Suyanto I Gde Antha Kasmawan I Made Yuliara Mayumi Cahyandari Winardi Tjahyo Baskoro