Firdaus, S., Ahmad, U., Syauqi, F., Daryono, ., Mustofa, F., Nugroho, H., Farady, I., & Tresna, W. (2026). Geofenced Earthquake Notification System Using Haversine-Based Distance Calculation and MMI Intensity Estimation. International Journal of Geoinformatics, 22(8), 1. https://doi.org/10.52939/ijg.v22i8.5146