Earthquakes in Tonga — February 2026

15 earthquakes were recorded in Tonga during February 2026, an average of 0.5 per day.

15 reached magnitude 4 or above and 8 reached magnitude 5 or above. The average focal depth was 213 km.

The month's largest event in Tonga was a magnitude 5.6 earthquake near Hihifo, Tonga on 10 February 2026 at 21:14 UTC. A magnitude 5.6 earthquake radiates roughly 3,788 tons of TNT equivalent in seismic energy.

That is close to the Tonga monthly average of 18 events over the period we cover, and down from the 19 recorded the previous month.

40% of events here are shallow (under 70 km), 20% intermediate (70–300 km) and 40% 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 7 in the magnitude 4 range, 8 in the magnitude 5 range.

Activity peaked on 09 February, when 2 events were recorded.

The month's largest events were M5.6 near Hihifo, Tonga on 10 February at 10 km; M5.4 near Houma, Tonga on 22 February at 175 km; M5.3 near Hihifo, Tonga on 15 February at 10 km.

That is 19% below the 18 events Tonga averages per month across the 21 months on record.