Earthquakes in the Northern Mariana Islands — October 2025
1 earthquakes were recorded in the Northern Mariana Islands during October 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 10 km.
The month's largest event in the Northern Mariana Islands was a magnitude 4.8 earthquake near Saipan, Northern Mariana Islands on 06 October 2025 at 01:27 UTC. A magnitude 4.8 earthquake radiates roughly 239 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 4 recorded the previous month.
100% of events here are shallow (under 70 km), 0% intermediate (70–300 km) and 0% deep-focus (over 300 km). Almost everything here is crustal. That is characteristic of transform faulting or continental deformation rather than subduction — and it means shaking at the surface is strong for the magnitudes involved.
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.
Largest earthquakes in the Northern Mariana Islands, October 2025
1 event listed below, newest first. Times are UTC. Click any column header to re-sort.
| Time (UTC) | Mag | Location | Depth (km) | Country | Details |
|---|---|---|---|---|---|
| 4.8 | Saipan, Northern Mariana Islands | 10.0 | Northern Mariana Islands | View details View |
Frequently asked questions
How many earthquakes hit the Northern Mariana Islands in October 2025?
1 earthquakes were recorded in the Northern Mariana Islands during October 2025, of which 1 were magnitude 4 or above.
What was the biggest earthquake in the Northern Mariana Islands in October 2025?
A magnitude 4.8 event near Saipan, Northern Mariana Islands on 06 October 2025.
Other months in the Northern Mariana Islands
Magnitudes for October 2025 reflect the current USGS review status and may have been revised since first publication. See our guides on the magnitude scale, focal depth and why earthquakes cluster.