Saefurohmah, Mufti, et al. “Analisis Variasi B-Value Dan a-Value Menggunakan Perangkat Lunak ZMAP Sebagai Indikator Potensi Gempabumi Di Wilayah Jawa Timur: Analysis of B-Value and a-Value Variations Using ZMap Software As an Indicator of Earthquake Potential in the East Java Region”. Jurnal Stasiun Geofisika Sleman, vol. 3, no. 2, Dec. 2025, pp. 18-23, https://jurnal.stageofsleman.id/index.php/jsgs/article/view/45.