M4.4 Earthquake 141 km WNW of Neiafu, Tonga — August 20, 2025
2025-08-20 20:35:02 UTC (2025-08-20) · approx. 8:35 AM UTC-12 local
On August 20, 2025 at 20:35 UTC, a magnitude 4.4 intermediate depth earthquake struck 141 km WNW of Neiafu, Tonga, at a depth of 236.6 km and coordinates -18.2373°, -175.2488°.
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
-175.2488°E
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Common Questions
How strong was the magnitude 4.4 earthquake near Neiafu, Tonga?
The magnitude 4.4 earthquake that struck 141 km WNW of Neiafu, Tonga on August 20, 2025 at 20:35 UTC had a depth of 236.6 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: us6000r2l2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 20, 2025). M4.4 Earthquake 141 km WNW of Neiafu, Tonga — August 20, 2025. Retrieved November 12, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000r2l2/