M4.2 Earthquake 35 km NNW of Dededo Village, Guam — September 3, 2025
2025-09-03 22:59:32 UTC (2025-09-03) · approx. 8:59 AM UTC+10 local
On September 3, 2025 at 22:59 UTC, a magnitude 4.2 intermediate depth earthquake struck 35 km NNW of Dededo Village, Guam, at a depth of 156.3 km and coordinates 13.7956°, 144.6687°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.6687°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Dededo Village, Guam?
The magnitude 4.2 earthquake that struck 35 km NNW of Dededo Village, Guam on September 3, 2025 at 22:59 UTC had a depth of 156.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rd5t). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 3, 2025). M4.2 Earthquake 35 km NNW of Dededo Village, Guam — September 3, 2025. Retrieved November 30, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000rd5t/