M4.3 Earthquake 101 km SSE of Alo, Wallis and Futuna — July 8, 2021
2021-07-08 23:28:17 UTC (2021-07-08) · approx. 11:28 AM UTC-12 local
On July 8, 2021 at 23:28 UTC, a magnitude 4.3 deep-focus earthquake struck 101 km SSE of Alo, Wallis and Futuna, at a depth of 396.9 km and coordinates -15.1116°, -177.6569°.
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
-177.6569°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 101 km SSE of Alo, Wallis and Futuna on July 8, 2021 at 23:28 UTC had a depth of 396.9 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: us7000elm5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 8, 2021). M4.3 Earthquake 101 km SSE of Alo, Wallis and Futuna — July 8, 2021. Retrieved September 10, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000elm5/