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All Journal Tunas Geografi Jurnal Fisika Unand Jurnal Pendidikan Fisika JOURNAL ONLINE OF PHYSICS Jurnal Geocelebes JISTech (Journal of Islamic Science and Technology) Fisitek : Jurnal Ilmu Fisika dan Teknologi JOURNAL OF SCIENCE AND SOCIAL RESEARCH Jurnal Teori dan Aplikasi Fisika Journal of Technomaterial Physics
Ratni Sirait
UNIVERSITAS ISLAM NEGERI SUMATERA UTARA
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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STUDI PGA (PEAK GROUND ACCELERATION) DENGAN MENGGUNAKAN METODE MC. GUIRRE R.K BERDASARKAN DATA GEMPA BUMI PERIODE 1986-2021 DI WILAYAH SUMATERA BARAT Putri Amini Lubis; Lailatul Husna Br. Lubis; Ratni Sirait
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 10, No 1 (2026)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v10i1.26011

Abstract

Wilayah Sumatera Barat memiliki tiga sumber utama pembangkit gempa bumi, yaitu zona subduksi lempeng, sesar semangko dan sesar mentawai. Penelitian ini dilakukan bertujuan untuk mengetahui nilai PGA di Wilayah Sumatera Barat berdasarkan analisa data gempa bumi periode 01 Desember (1986 s/d 2021) dan untuk mengetahui pemetaan PGA serta mengetahui letak daerah tingkat resiko kerusakan tertinggi akibat gempa bumi di Wilayah Sumatera Barat. Data penelitian yang digunakan adalah data gempa bumi dengan rentang waktu 35 tahun (01 Desember 1986-01 Desember 2021) menggunakan katalog USGS dan IRIS dengan magnitudo 5-10 serta kedalaman sumber gempa 0-70 km dan difokuskan pada koordinat Wilayah Sumatera Barat 0.9° LU3.5° LS dan 98 BT 102° BT. Penelitian ini menggunakan Metode Mc. Guirre R.K. Hasil pengolahan dan menghasilkan pemetaan nilai PGA dengan metode Mc. Guirre R.K sebesar 131,582482 gal yang berada di daerah Kabupaten Kepulauan Mentawai dengan magnitudo 6,496666667 Ms serta kedalaman sumber gempa 28,9 km.
Effect of Magnitude and Distance on Peak Ground Acceleration Using a Modified Akkar & Boomer (2007) GMPE for North Sumatra Tia Melati; Lailatul Husna Lubis; Ratni Sirait; Angga Wijaya
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.22751

Abstract

The Ground Motion Prediction Equation (GMPE) is very important in estimating the intensity of earthquake shocks as a basis for risk mitigation. This study aims to modify and validate the Akkar & Boomer (2007) GMPE using shallow earthquake data in the North Sumatra region for the period 2017–2023. The earthquake data were obtained from BMKG and included parameters such as magnitude, depth, and distance from the source. The analysis method involved nonlinear regression, data cleaning, and validation using residual analysis. The results showed that the maximum ground acceleration (PGA) tended to decrease nonlinearly with increasing distance from the earthquake source. The modified GMPE equation was: Log₁₀ PGA = −0.5916 + 0.5875M + 0.0576M² + (−0.8699 + − 0.1985M) Log₁₀(√R² + 8.2032²) + 0.105, with an R² value of 0.56 and prediction error values such as 0.21; MAE 0.36; RMSE 0.46; STD 0.46). Thus, the modification of GMPE based on local data can provide a more representative estimate of earthquake hazards to support mitigation efforts in North Sumatra.
Co-Authors Afifah Azmi Angga Wijaya Aulia Anggraini Derlina Nasution Ety Jumiati Hilwa Anisa Karya Sinulingga Lailatul Husna Br. Lubis Lailatul Husna Lubis Maryono Maryono Masthura, Masthura Meilita Rahma Nazaruddin Nasution Novita Sari Nurhaliza Maharani Putri Amini Lubis Riski Efrina Siregar Rosyidah Mardiyah Sagala Saza Amiroh Siti Munawaroh Tia Melati