M4.3 Earthquake 243 km WNW of Neiafu, Tonga — April 12, 2025
2025-04-12 17:02:19 UTC (2025-04-12) · approx. 5:02 AM UTC-12 local
On April 12, 2025 at 17:02 UTC, a magnitude 4.3 shallow crustal earthquake struck 243 km WNW of Neiafu, Tonga, at a depth of 10.0 km and coordinates -17.7738°, -176.0948°.
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
-176.0948°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Neiafu, Tonga?
The magnitude 4.3 earthquake that struck 243 km WNW of Neiafu, Tonga on April 12, 2025 at 17:02 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: us7000pv2j). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 12, 2025). M4.3 Earthquake 243 km WNW of Neiafu, Tonga — April 12, 2025. Retrieved June 14, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pv2j/