According to IDMC's Internal Displacement Updates, deduplicated to one figure per event, 196,118 disaster-driven internal displacements were recorded in Indonesia across 10 events between 1 and 30 September 2026. This figure exceeds both the absolute floor of 50,000 and the 90th percentile of Indonesia's own monthly record over the previous 19 months, which stands at 71,333. Of the total, 195,372 displacements, dated 2 September and sourced to the Crisis Centre of the Ministry of Health, are recorded against the earthquake in East Nusa Tenggara of 15 August 2026. The next largest figure is 650 displacements linked to volcanic activity at Mt. Sinabung in Karo, North Sumatra, reported by the National Agency for Disaster Management (BNPB).
| Rule | Displacement in a month against the country's own record |
| Period | 2026-09-01 to 2026-09-30 |
| Displacement in the month | 196,118 |
| Events in the month | 10 |
| Months of history compared | 19 |
| 90th percentile of that history | 71,333 |
| Judged against | an absolute floor of 50,000; the 90th percentile of the country's own record, 71,333. Fired on: abs_floor, history_percentile. |
| Detected | 13 October 2026, run 19 |
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