M4.4 Earthquake 264 km S of Alo, Wallis and Futuna — April 19, 2021
2021-04-19 20:01:00 UTC (2021-04-19) · approx. 8:01 AM UTC-12 local
On April 19, 2021 at 20:01 UTC, a magnitude 4.4 deep-focus earthquake struck 264 km S of Alo, Wallis and Futuna, at a depth of 545.5 km and coordinates -16.6914°, -177.9053°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-177.9053°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Alo, Wallis and Futuna?
The magnitude 4.4 earthquake that struck 264 km S of Alo, Wallis and Futuna on April 19, 2021 at 20:01 UTC had a depth of 545.5 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000e41h). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 19, 2021). M4.4 Earthquake 264 km S of Alo, Wallis and Futuna — April 19, 2021. Retrieved July 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000e41h/