M4.0 Earthquake 138 km S of Hihifo, Tonga — August 28, 2024
2024-08-28 21:44:56 UTC (2024-08-28) · approx. 9:44 AM UTC-12 local
On August 28, 2024 at 21:44 UTC, a magnitude 4.0 intermediate depth earthquake struck 138 km S of Hihifo, Tonga, at a depth of 102.9 km and coordinates -17.1890°, -173.9988°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-173.9988°E
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Common Questions
How strong was the magnitude 4.0 earthquake near Hihifo, Tonga?
The magnitude 4.0 earthquake that struck 138 km S of Hihifo, Tonga on August 28, 2024 at 21:44 UTC had a depth of 102.9 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000ngdk). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, August 28, 2024). M4.0 Earthquake 138 km S of Hihifo, Tonga — August 28, 2024. Retrieved November 9, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000ngdk/