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Arfiani Nur Khusna
Universitas Ahmad Dahlan
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Spatio-Temporal Graph-Based Hotspot Analysis of Earthquake Events Using Spatial Autocorrelation and Community Detection in Indonesia Ika Arfiani; Herman Yuliansyah; Nur Rochmah Dyah Puji Astuti; Arfiani Nur Khusna
Journal of Information System and Informatics Vol 8 No 3 (2026): June
Publisher : Asosiasi Doktor Sistem Informasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63158/journalisi.v8i3.1641

Abstract

Analysis of clustered seismic regions is important for understanding seismic activity patterns in tectonic regions such as Indonesia. However, conventional spatial statistical approaches generally analyze earthquake events independently and fail to capture complex spatio-temporal relationships. This study proposes a graph-based spatio-temporal hotspot analysis approach integrating spatial autocorrelation and community detection to identify regional seismic interaction patterns. The dataset used consists of 3,000 earthquake events from 2008–2025. Spatial autocorrelation was analyzed using Moran’s I, while earthquake relationships were modeled using a spatio-temporal graph with spatial and temporal thresholds of ≤400 km and ≤60 days. The results showed significant positive spatial autocorrelation with Moran’s I = 0.3367 (p = 0.001). The resulting graph consisted of 3,000 nodes and 22,896 edges, revealing substantial regional-scale connectivity and 14 major clusters with a modularity score of 0.7405, indicating a strong community structure. Degree centrality analysis identified highly connected nodes with a maximum degree of 77. These findings indicate that integrating spatial autocorrelation and graph analysis provides a more comprehensive representation of seismic interaction patterns and may support future seismic risk assessment in tectonically active regions.
Co-Authors Aretama, Lucky Barga Arief, Muh. Rudyanto Dimas Chaerul Ekty Saputra Evitasari, Rachma Tia Habie, Khairul Fathan Herman Yuliansyah Ika Arfiani Krisvan Patra Delasano Kusrini Liena Sofiana Liena Sofiana Lisna Zahrotun Muh. Rudyanto Arief Muh. Rudyanto Arief Murein Miksa Mardhia Murinto Murinto Nugraha, Fahmi Ardhi Nur Rochmah Dyah PA Nur Rochmah Dyah Pujiastuti Nurhayati, Fitria Perwira, Luqman Tifa Prabowo, Ferry Agung Prakasa, Anabela Aji Putra, Ulinnuha Yudiansa Putri, Okhy Kharisma Rahmawati, Fitri Maulidah Rizkawati, Luthvi Rusydi Umar Safri Adam Sunardi Sunardi Suyahman Suyahman Ulinnuha Yudiansa Putra Yudhiakto Pramudya Yulianto, Dinan