Earthquake clustering analysis in North Sumatra region based on double-difference relocation. GEOGRAPHIA: Jurnal Penelitian dan Pendidikan Geografi, [S. l.], v. 6, n. 2, p. 257–262, 2025. Disponível em: https://ejournalfish.unima.ac.id/index.php/geographia/article/view/21. Acesso em: 17 jul. 2026.