M4.3 Earthquake 129 km SE of Alo, Wallis and Futuna — October 17, 2025
2025-10-17 20:44:36 UTC (2025-10-17) · approx. 8:44 AM UTC-12 local
On October 17, 2025 at 20:44 UTC, a magnitude 4.3 deep-focus earthquake struck 129 km SE of Alo, Wallis and Futuna, at a depth of 371.6 km and coordinates -15.1824°, -177.3107°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-177.3107°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Alo, Wallis and Futuna?
The magnitude 4.3 earthquake that struck 129 km SE of Alo, Wallis and Futuna on October 17, 2025 at 20:44 UTC had a depth of 371.6 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rlym). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 17, 2025). M4.3 Earthquake 129 km SE of Alo, Wallis and Futuna — October 17, 2025. Retrieved January 9, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rlym/