Earthquakes in Guam — July 2025
2 earthquakes were recorded in Guam during July 2025, an average of 0.1 per day.
2 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 51 km.
The month's largest event in Guam was a magnitude 4.8 earthquake near Merizo Village, Guam on 15 July 2025 at 22:18 UTC. A magnitude 4.8 earthquake radiates roughly 239 tons of TNT equivalent in seismic energy.
That is below the Guam monthly average of 4 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 2 in the magnitude 4 range.
The month's largest events were M4.8 near Merizo Village, Guam on 15 July at 61 km; M4.2 near Merizo Village, Guam on 25 July at 41 km.
That is 47% below the 4 events Guam averages per month across the 19 months on record.
Largest earthquakes in Guam, July 2025
2 events listed below, newest first. Times are UTC. Click any column header to re-sort.
| Time (UTC) | Mag | Location | Depth (km) | Country | Details |
|---|---|---|---|---|---|
| 4.8 | Merizo Village, Guam | 61.1 | Guam | View details View | |
| 4.2 | Merizo Village, Guam | 41.2 | Guam | View details View |
Frequently asked questions
How many earthquakes hit Guam in July 2025?
2 earthquakes were recorded in Guam during July 2025, of which 2 were magnitude 4 or above.
What was the biggest earthquake in Guam in July 2025?
A magnitude 4.8 event near Merizo Village, Guam on 15 July 2025.
Other months in Guam
Magnitudes for July 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.