Earthquakes in Guam — January 2025
5 earthquakes were recorded in Guam during January 2025, an average of 0.2 per day.
5 reached magnitude 4 or above and 2 reached magnitude 5 or above. The average focal depth was 64 km.
The month's largest event in Guam was a magnitude 5.5 earthquake near Agat Village, Guam on 21 January 2025 at 05:47 UTC. A magnitude 5.5 earthquake radiates roughly 2,682 tons of TNT equivalent in seismic energy.
That is well above the Guam monthly average of 4 events over the period we cover — an unusually active month, and up from the 4 recorded the previous month.
60% of events here are shallow (under 70 km), 40% 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 3 in the magnitude 4 range, 2 in the magnitude 5 range.
The month's largest events were M5.5 near Agat Village, Guam on 21 January at 133 km; M5.0 near Yigo Village, Guam on 11 January at 98 km; M4.8 near Merizo Village, Guam on 02 January at 10 km.
That is 27% above the 4 events Guam averages per month across the 18 months on record.
Largest earthquakes in Guam, January 2025
5 events listed below, newest first. Times are UTC. Click any column header to re-sort.
| Time (UTC) | Mag | Location | Depth (km) | Country | Details |
|---|---|---|---|---|---|
| 5.5 | Agat Village, Guam | 133.4 | Guam | View details View | |
| 5.0 | Yigo Village, Guam | 97.9 | Guam | View details View | |
| 4.8 | Merizo Village, Guam | 10.0 | Guam | View details View | |
| 4.7 | Merizo Village, Guam | 10.0 | Guam | View details View | |
| 4.3 | Merizo Village, Guam | 66.4 | Guam | View details View |
Frequently asked questions
How many earthquakes hit Guam in January 2025?
5 earthquakes were recorded in Guam during January 2025, of which 5 were magnitude 4 or above.
What was the biggest earthquake in Guam in January 2025?
A magnitude 5.5 event near Agat Village, Guam on 21 January 2025.
Other months in Guam
Magnitudes for January 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.