Earthquakes in Guam — October 2026
1 earthquakes were recorded in Guam during October 2026, an average of 0.0 per day.
1 reached magnitude 4 or above and 1 reached magnitude 5 or above. The average focal depth was 112 km.
The month's largest event in Guam was a magnitude 5.3 earthquake near Yigo Village, Guam on 10 October 2026 at 03:58 UTC. A magnitude 5.3 earthquake radiates roughly 1,344 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.
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 5 range.
That is 74% below the 4 events Guam averages per month across the 20 months on record.
Largest earthquakes in Guam, October 2026
1 event listed below, newest first. Times are UTC. Click any column header to re-sort.
| Time (UTC) | Mag | Location | Depth (km) | Country | Details |
|---|---|---|---|---|---|
| 5.3 | Yigo Village, Guam | 111.6 | Guam | View details View |
Frequently asked questions
How many earthquakes hit Guam in October 2026?
1 earthquakes were recorded in Guam during October 2026, of which 1 were magnitude 4 or above.
What was the biggest earthquake in Guam in October 2026?
A magnitude 5.3 event near Yigo Village, Guam on 10 October 2026.
Other months in Guam
Magnitudes for October 2026 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.