M4.6 Earthquake 120 km ESE of Alo, Wallis and Futuna — February 19, 2021
2021-02-19 21:37:28 UTC (2021-02-19) · approx. 9:37 AM UTC-12 local
On February 19, 2021 at 21:37 UTC, a magnitude 4.6 shallow crustal earthquake struck 120 km ESE of Alo, Wallis and Futuna, at a depth of 10.0 km and coordinates -14.6688°, -177.0517°.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-177.0517°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Alo, Wallis and Futuna?
The magnitude 4.6 earthquake that struck 120 km ESE of Alo, Wallis and Futuna on February 19, 2021 at 21:37 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -14.6688°, -177.0517°, which is 120 km ESE of Alo, Wallis and Futuna.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000dkrz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, February 19, 2021). M4.6 Earthquake 120 km ESE of Alo, Wallis and Futuna — February 19, 2021. Retrieved May 4, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000dkrz/