M4.4 Earthquake 122 km NNW of Neiafu, Tonga — September 13, 2025
2025-09-13 17:48:18 UTC (2025-09-13) · approx. 5:48 AM UTC-12 local
On September 13, 2025 at 17:48 UTC, a magnitude 4.4 intermediate depth earthquake struck 122 km NNW of Neiafu, Tonga, at a depth of 137.8 km and coordinates -17.5688°, -174.2100°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-174.2100°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Neiafu, Tonga?
The magnitude 4.4 earthquake that struck 122 km NNW of Neiafu, Tonga on September 13, 2025 at 17:48 UTC had a depth of 137.8 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rf4n). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 13, 2025). M4.4 Earthquake 122 km NNW of Neiafu, Tonga — September 13, 2025. Retrieved December 3, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000rf4n/