Earthquakes in the Philippines — September 2025

29 earthquakes were recorded in the Philippines during September 2025, an average of 1.0 per day.

29 reached magnitude 4 or above and 10 reached magnitude 5 or above. The average focal depth was 98 km.

The month's largest event in the Philippines was a magnitude 6.9 earthquake near Calape, Philippines on 30 September 2025 at 13:59 UTC. A magnitude 6.9 earthquake radiates roughly 337,605 tons of TNT equivalent in seismic energy.

That is close to the the Philippines monthly average of 35 events over the period we cover, and up from the 16 recorded the previous month.

69% of events here are shallow (under 70 km), 21% intermediate (70–300 km) and 10% 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 19 in the magnitude 4 range, 9 in the magnitude 5 range, 1 in the magnitude 6 range.

Activity peaked on 30 September, when 8 events were recorded.

1 event(s) this month carry a USGS link to NOAA tsunami information; the flag does not indicate whether a tsunami occurred.

The month's largest events were M6.9 near Calape, Philippines on 30 September at 10 km; M5.3 near Bacnotan, Philippines on 18 September at 35 km; M5.3 near Dinagat, Philippines on 08 September at 122 km.

That is 16% below the 35 events the Philippines averages per month across the 21 months on record.