Earthquakes in Indonesia — September 2026

30 earthquakes were recorded in Indonesia during September 2026, an average of 1.0 per day.

30 reached magnitude 4 or above and 9 reached magnitude 5 or above. The average focal depth was 69 km.

The month's largest event in Indonesia was a magnitude 6.5 earthquake near Teluknaga, Indonesia on 11 September 2026 at 21:23 UTC. A magnitude 6.5 earthquake radiates roughly 84,802 tons of TNT equivalent in seismic energy.

That is below the Indonesia monthly average of 69 events over the period we cover — a comparatively quiet month, and down from the 186 recorded the previous month.

67% of events here are shallow (under 70 km), 30% intermediate (70–300 km) and 3% deep-focus (over 300 km). A substantial share of intermediate-depth events points to a subducting slab beneath the region rather than purely crustal faulting.

By band, the catalogue holds 21 in the magnitude 4 range, 8 in the magnitude 5 range, 1 in the magnitude 6 range.

Activity peaked on 05 September, when 5 events were recorded.

The month's largest events were M6.5 near Teluknaga, Indonesia on 11 September at 372 km; M5.6 near Maba, Indonesia on 01 September at 10 km; M5.6 near Abepura, Indonesia on 02 September at 69 km.

That is 57% below the 69 events Indonesia averages per month across the 22 months on record.