M5.1 Earthquake 169 km SSW of Alo, Wallis and Futuna — January 25, 2021
2021-01-25 20:42:07 UTC (2021-01-25) · approx. 8:42 AM UTC-12 local
On January 25, 2021 at 20:42 UTC, a magnitude 5.1 shallow crustal earthquake struck 169 km SSW of Alo, Wallis and Futuna, at a depth of 10.0 km and coordinates -15.7415°, -178.6792°.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-178.6792°E
Technical Information
Common Questions
How strong was the magnitude 5.1 earthquake near Alo, Wallis and Futuna?
The magnitude 5.1 earthquake that struck 169 km SSW of Alo, Wallis and Futuna on January 25, 2021 at 20:42 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -15.7415°, -178.6792°, which is 169 km SSW of Alo, Wallis and Futuna.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000d38u). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 25, 2021). M5.1 Earthquake 169 km SSW of Alo, Wallis and Futuna — January 25, 2021. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000d38u/