M4.2 Earthquake 252 km SSE of Alo, Wallis and Futuna — November 21, 2023
2023-11-21 20:35:15 UTC (2023-11-21) · approx. 8:35 AM UTC-12 local
On November 21, 2023 at 20:35 UTC, a magnitude 4.2 deep-focus earthquake struck 252 km SSE of Alo, Wallis and Futuna, at a depth of 405.6 km and coordinates -16.4890°, -177.4233°.
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
-177.4233°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Alo, Wallis and Futuna?
The magnitude 4.2 earthquake that struck 252 km SSE of Alo, Wallis and Futuna on November 21, 2023 at 20:35 UTC had a depth of 405.6 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 4.2 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: us6000lpwv). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, November 21, 2023). M4.2 Earthquake 252 km SSE of Alo, Wallis and Futuna — November 21, 2023. Retrieved February 1, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000lpwv/