Pertiwi, I. I.; Marniati; Joshua Purba; Trismahargyono. Seismic Activity Parameters (seismicity Index, Annual Probability, and Recurrence Time) Estimated for the M ≥ 4.0 Earthquakes in East Kolaka, Indonesia. J. Nat. Scien. & Math. Res. 2026, 12, 23-40.