Earthquakes in Indonesia — September 2025
59 earthquakes were recorded in Indonesia during September 2025, an average of 2.0 per day.
59 reached magnitude 4 or above and 8 reached magnitude 5 or above. The average focal depth was 61 km.
The month's largest event in Indonesia was a magnitude 6.1 earthquake near Nabire, Indonesia on 18 September 2025 at 18:19 UTC. A magnitude 6.1 earthquake radiates roughly 21,301 tons of TNT equivalent in seismic energy.
That is close to the Indonesia monthly average of 70 events over the period we cover, and down from the 63 recorded the previous month.
76% of events here are shallow (under 70 km), 22% intermediate (70–300 km) and 2% deep-focus (over 300 km). The mix is dominated by shallow crustal events, with a minority of intermediate-depth activity.
By band, the catalogue holds 51 in the magnitude 4 range, 6 in the magnitude 5 range, 2 in the magnitude 6 range.
Activity peaked on 18 September, when 6 events were recorded.
The month's largest events were M6.1 near Nabire, Indonesia on 18 September at 10 km; M6.0 near Kalianget, Indonesia on 30 September at 14 km; M5.3 near Sungai Penuh, Indonesia on 14 September at 67 km.
That is 16% below the 70 events Indonesia averages per month across the 21 months on record.
Largest earthquakes in Indonesia, September 2025
59 events listed below, newest first. Times are UTC. Click any column header to re-sort.
Frequently asked questions
How many earthquakes hit Indonesia in September 2025?
59 earthquakes were recorded in Indonesia during September 2025, of which 59 were magnitude 4 or above.
What was the biggest earthquake in Indonesia in September 2025?
A magnitude 6.1 event near Nabire, Indonesia on 18 September 2025.
Other months in Indonesia
Magnitudes for September 2025 reflect the current USGS review status and may have been revised since first publication. See our guides on the magnitude scale, focal depth and why earthquakes cluster.