We conducted a systematic search for earthquake swarms in Eastern Indonesia (2012-2021) using BMKG's (Badan Meteorologi, Klimatologi, dan Geofisika) finalized catalog, identifying 14 swarms across Bali, Lombok, Nusa Tenggara, Banda, Seram, Papua, Sulawesi, Maluku, and Halmahera. Swarms were detected based on distinct spatio-temporal clustering without preceding or subsequent M > 6 events. From this process, we identified 14 potential earthquake swarms located sporadically in eastern Indonesia. Seismic swarm activity in eastern Indonesia provides critical insight into diverse crustal stress-release mechanisms within this complex tectonic setting. Analysis of multiple swarms across five regions - Lombok-Nusa Tenggara, Sulawesi, Molucca Sea-Halmahera, Banda-Seram, and Papua - reveals consistent patterns: swarms occur at shallow depths (<20 km), exhibit tight magnitude ranges without a dominant mainshock, and are driven by varied triggers including volcanic unrest, tectonic faulting, subduction dynamics, and fluid migration. Key controls include subductionrelated crustal stretching, strike-slip fault activation, and magmatic-fluid interactions. These swarms amplify local seismic hazards due to their shallow, prolonged nature and occurrence on previously unidentified secondary faults. The findings emphasize the necessity of continuous monitoring and refined hazard assessments to address region-specific risks associated with swarm-induced ground shaking and their potential triggering by larger tectonic events. © Published under licence by IOP Publishing Ltd