M4.9 Earthquake 122 km SSW of Merizo Village, Guam — October 24, 2025
2025-10-24 19:04:12 UTC (2025-10-24) · approx. 5:04 AM UTC+10 local
On October 24, 2025 at 19:04 UTC, a magnitude 4.9 shallow crustal earthquake struck 122 km SSW of Merizo Village, Guam, at a depth of 10.0 km and coordinates 12.2984°, 144.1110°. This earthquake was detected by 196 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.1110°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.9 earthquake near Merizo Village, Guam?
The magnitude 4.9 earthquake that struck 122 km SSW of Merizo Village, Guam on October 24, 2025 at 19:04 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 12.2984°, 144.1110°, which is 122 km SSW of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 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: us6000rj9z). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 24, 2025). M4.9 Earthquake 122 km SSW of Merizo Village, Guam — October 24, 2025. Retrieved May 26, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rj9z/