M4.3 Earthquake 139 km NW of Neiafu, Tonga — October 25, 2025
2025-10-25 18:50:28 UTC (2025-10-25) · approx. 6:50 AM UTC-12 local
On October 25, 2025 at 18:50 UTC, a magnitude 4.3 intermediate depth earthquake struck 139 km NW of Neiafu, Tonga, at a depth of 182.1 km and coordinates -17.9030°, -175.0440°.
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
-175.0440°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 139 km NW of Neiafu, Tonga on October 25, 2025 at 18:50 UTC had a depth of 182.1 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: us6000rnb8). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 25, 2025). M4.3 Earthquake 139 km NW of Neiafu, Tonga — October 25, 2025. Retrieved January 15, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rnb8/