Earthquakes in Indonesia — February 2025

91 earthquakes were recorded in Indonesia during February 2025, an average of 3.2 per day.

91 reached magnitude 4 or above and 22 reached magnitude 5 or above. The average focal depth was 96 km.

The month's largest event in Indonesia was a magnitude 6.1 earthquake near Modisi, Indonesia on 25 February 2025 at 22:55 UTC. A magnitude 6.1 earthquake radiates roughly 21,301 tons of TNT equivalent in seismic energy.

That is well above the Indonesia monthly average of 70 events over the period we cover — an unusually active month, and up from the 49 recorded the previous month.

58% of events here are shallow (under 70 km), 35% intermediate (70–300 km) and 7% deep-focus (over 300 km). That proportion of deep-focus events is the signature of a subduction zone: only a cold slab descending into the mantle stays brittle enough to rupture at those depths.

By band, the catalogue holds 69 in the magnitude 4 range, 21 in the magnitude 5 range, 1 in the magnitude 6 range.

Activity peaked on 26 February, when 10 events were recorded.

The month's largest events were M6.1 near Modisi, Indonesia on 25 February at 10 km; M5.9 near Tobelo, Indonesia on 03 February at 101 km; M5.8 near southwest of Sumatra, Indonesia on 07 February at 10 km.

That is 30% above the 70 events Indonesia averages per month across the 21 months on record.