M4.7 Earthquake 143 km WSW of Merizo Village, Guam — April 20, 2025
2025-04-20 20:33:33 UTC (2025-04-20) · approx. 6:33 AM UTC+10 local
On April 20, 2025 at 20:33 UTC, a magnitude 4.7 intermediate depth earthquake struck 143 km WSW of Merizo Village, Guam, at a depth of 131.6 km and coordinates 12.8541°, 143.4135°. This earthquake was detected by 86 seismic stations with excellent 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
143.4135°E
Technical Information
Common Questions
How strong was the magnitude 4.7 earthquake near Merizo Village, Guam?
The magnitude 4.7 earthquake that struck 143 km WSW of Merizo Village, Guam on April 20, 2025 at 20:33 UTC had a depth of 131.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 12.8541°, 143.4135°, which is 143 km WSW 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.
Actions
Authoritative source: USGS event page (event ID: us6000q7fi). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 20, 2025). M4.7 Earthquake 143 km WSW of Merizo Village, Guam — April 20, 2025. Retrieved June 27, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000q7fi/