M4.7 Earthquake 111 km S of Merizo Village, Guam — October 11, 2025
2025-10-11 23:20:50 UTC (2025-10-11) · approx. 9:20 AM UTC+10 local
On October 11, 2025 at 23:20 UTC, a magnitude 4.7 shallow crustal earthquake struck 111 km S of Merizo Village, Guam, at a depth of 10.0 km and coordinates 12.2738°, 144.4749°. This earthquake was detected by 45 seismic stations with good location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.4749°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.7 earthquake near Merizo Village, Guam?
The magnitude 4.7 earthquake that struck 111 km S of Merizo Village, Guam on October 11, 2025 at 23:20 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 12.2738°, 144.4749°, which is 111 km S of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us6000rgmr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 11, 2025). M4.7 Earthquake 111 km S of Merizo Village, Guam — October 11, 2025. Retrieved May 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rgmr/