M4.3 Earthquake 117 km ESE of Fangale’ounga, Tonga — April 29, 2025
2025-04-29 18:21:33 UTC (2025-04-29) · approx. 6:21 AM UTC-12 local
On April 29, 2025 at 18:21 UTC, a magnitude 4.3 shallow crustal earthquake struck 117 km ESE of Fangale’ounga, Tonga, at a depth of 10.0 km and coordinates -20.2234°, -173.3200°.
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
-173.3200°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Fangale’ounga, Tonga?
The magnitude 4.3 earthquake that struck 117 km ESE of Fangale’ounga, Tonga on April 29, 2025 at 18:21 UTC had a depth of 10.0 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: us7000pzdx). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 29, 2025). M4.3 Earthquake 117 km ESE of Fangale’ounga, Tonga — April 29, 2025. Retrieved July 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pzdx/