M4.9 Earthquake 181 km SW of Merizo Village, Guam — April 28, 2025
2025-04-28 00:04:11 UTC (2025-04-28) · approx. 10:04 AM UTC+10 local
On April 28, 2025 at 00:04 UTC, a magnitude 4.9 shallow crustal earthquake struck 181 km SW of Merizo Village, Guam, at a depth of 10.0 km and coordinates 11.9834°, 143.6220°. This earthquake was detected by 48 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
143.6220°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 181 km SW of Merizo Village, Guam on April 28, 2025 at 00:04 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 11.9834°, 143.6220°, which is 181 km SW 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.
Actions
Authoritative source: USGS event page (event ID: us7000pvh5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 28, 2025). M4.9 Earthquake 181 km SW of Merizo Village, Guam — April 28, 2025. Retrieved July 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pvh5/