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All Journal Geosains Kutai Basin Faraday: Journal of Fundamental Physics, Research, and Applied Science
Harsano Jayadi
Tadulako University
Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Earthquake Analysis Using the Probabilistic Seismic Hazard Analysis (PSHA) Method in Palu City Harsano Jayadi; Icha Untari Meidji; Irna Hidayat; Abdullah
Faraday: Journal of Fundamental Physics, Research, and Applied Science Vol. 1 No. 2 (2025): Faraday: Journal of Fundamental Physics, Research, and Applied Science
Publisher : Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/faraday.v1i2.18

Abstract

Palu, Indonesia, is a region with high seismic activity due to its location on the active Palu-Koro fault line. This study aims to analyze the probability of earthquakes, the spatial and temporal distribution of earthquake occurrences, and disaster mitigation efforts in anticipation of earthquakes in the region. Earthquake data in Palu City were analyzed based on magnitude, depth, and frequency of occurrence. The results indicate that most earthquakes occur at shallow depths ranging from approximately 10 to 56.8 kilometers, with a dominance of moderate magnitude (5.0–5.7 M_w). Over the past two decades, there has been an increase in the temporal occurrence of earthquakes, with a significant surge in 2018 when a magnitude 7.5 earthquake triggered a tsunami and liquefaction. Probability analysis indicates that earthquakes with high seismicity indices are highly likely to occur within a 10- to 50-year timeframe. The spatial distribution reveals that earthquakes tend to be concentrated around the Palu-Koro fault, the primary source of seismic activity in the region. These findings provide important insights into the seismic patterns of Palu City and can inform community preparedness and disaster mitigation strategy development.
Karakteristik Parameter Gutenberg–Richter dan Omori pada Seismisitas Gempa Bumi di Provinsi Sulawesi Tengah Icha Meidji; Muhammad Fawwaz Ilham; Harsano Jayadi
GEOSAINS KUTAI BASIN Vol. 9 No. 1 (2026)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/t8cq8435

Abstract

Provinsi Sulawesi Tengah merupakan wilayah dengan aktivitas tektonik yang sangat dinamis, terutama akibat keberadaan sistem Sesar Palu-Koro. Penelitian ini bertujuan untuk menganalisis karakteristik seismisitas di wilayah tersebut dengan menerapkan Hukum Gutenberg-Richter dan Hukum Omori. Data yang digunakan bersumber dari katalog gempa bumi periode 2015-2025 serta data spesifik gempa susulan pasca-peristiwa gempa Palu 2018. Analisis statistik menunjukkan nilai produktivitas seismik (a-value) sebesar 7,511 dan tingkat kerapuhan batuan (b-value) sebesar 1,073. Selain itu, pola peluruhan gempa susulan divalidasi menggunakan Hukum Omori, yang menunjukkan penurunan drastis dari 51 kejadian pada hari pertama menjadi 5 kejadian pada hari ketujuh. Hasil penelitian ini memberikan kontribusi penting dalam pemetaan risiko bencana dengan menunjukkan bahwa meskipun aktivitas seismik di Sulawesi Tengah sangat tinggi, pola peluruhan energinya mengikuti tren eksponensial yang stabil. Temuan ini krusial bagi pemerintah daerah dalam menyusun strategi mitigasi bencana berbasis data statistik parameter fisik batuan.
Co-Authors Abdullah Icha Meidji Irna Hidayat Meidji, Icha Untari Muhammad Fawwaz Ilham