Earthquakes in the Northern Mariana Islands — August 2025

1 earthquakes were recorded in the Northern Mariana Islands during August 2025, an average of 0.0 per day.

1 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 223 km.

The month's largest event in the Northern Mariana Islands was a magnitude 4.5 earthquake near Pagan region, Northern Mariana Islands on 23 August 2025 at 23:37 UTC. A magnitude 4.5 earthquake radiates roughly 85 tons of TNT equivalent in seismic energy.

That is below the the Northern Mariana Islands monthly average of 3 events over the period we cover — a comparatively quiet month, and down from the 3 recorded the previous month.

0% of events here are shallow (under 70 km), 100% intermediate (70–300 km) and 0% deep-focus (over 300 km). A substantial share of intermediate-depth events points to a subducting slab beneath the region rather than purely crustal faulting.

By band, the catalogue holds 1 in the magnitude 4 range.

That is 70% below the 3 events the Northern Mariana Islands averages per month across the 20 months on record.