Earthquakes in Indonesia — March 2025

93 earthquakes were recorded in Indonesia during March 2025, an average of 3.0 per day.

92 reached magnitude 4 or above and 9 reached magnitude 5 or above. The average focal depth was 92 km.

The month's largest event in Indonesia was a magnitude 5.8 earthquake near Masohi, Indonesia on 17 March 2025 at 17:32 UTC. A magnitude 5.8 earthquake radiates roughly 7,558 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 down from the 98 recorded the previous month.

62% of events here are shallow (under 70 km), 31% intermediate (70–300 km) and 6% 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 1 in the magnitude 3 range, 83 in the magnitude 4 range, 9 in the magnitude 5 range.

Activity peaked on 17 March, when 7 events were recorded.

The month's largest events were M5.8 near Masohi, Indonesia on 17 March at 10 km; M5.6 near Tambolaka, Indonesia on 31 March at 28 km; M5.5 near Sibolga, Indonesia on 17 March at 52 km.

That is 33% above the 70 events Indonesia averages per month across the 21 months on record.