Earthquakes in Guam
No events have been recorded in Guam in the past 30 days, and 27 of the events on record reached magnitude 5 or above — the level at which damage becomes a genuine concern for vulnerable construction.
71 earthquakes have been recorded in Guam in our catalogue, 0 of them in the past 30 days.
The average magnitude is 4.9 and the average focal depth 68 km. 70 events reached magnitude 4 or above and 27 reached magnitude 5 or above.
The strongest earthquake recorded in Guam in this period was a magnitude 6.1 event near Yigo Village, Guam on 10 August 2025, at a depth of 10 km. A magnitude 6.1 earthquake radiates roughly 21,301 tons of TNT equivalent in seismic energy.
Locations recording the most events include Merizo Village (31), Yigo Village (23), Inarajan Village (8), Asan-Maina Village (3), Tamuning-Tumon-Harmon Village (2).
61% of events here are shallow (under 70 km), 39% 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.
The deepest event on record here was a magnitude 4.5 earthquake at 213 km beneath Merizo Village, Guam on 09 February 2026.
By band, the catalogue holds 1 in the magnitude 3 range, 43 in the magnitude 4 range, 26 in the magnitude 5 range, 1 in the magnitude 6 range.
The busiest single day was 10 August 2025, with 6 recorded events.
No event in this record carries a USGS link to NOAA tsunami information.
All recorded earthquakes in Guam
71 events listed below, newest first. Times are UTC. Click any column header to re-sort.
Strongest recorded earthquakes in Guam
Frequently asked questions
How many earthquakes have there been in Guam?
71 earthquakes are recorded in Guam in our catalogue, including 0 in the past 30 days and 70 of magnitude 4 or above.
What was the biggest earthquake in Guam?
The largest recorded here was a magnitude 6.1 event near Yigo Village, Guam on 10 August 2025.
Is Guam at risk of earthquakes?
Earthquake hazard depends on proximity to active faults and plate boundaries rather than on national borders. The record for Guam shows 70 events of magnitude 4 or above, which is the band at which shaking becomes widely noticeable. Consult your national seismic hazard agency for building-code and preparedness guidance.
Earthquakes in Guam by month
Event counts for Guam reflect seismic network density as well as genuine activity. See our guides on the magnitude scale, focal depth and why earthquakes cluster.