M4.1 Earthquake 285 km WNW of Houma, Tonga — February 18, 2025
2025-02-18 18:18:17 UTC (2025-02-18) · approx. 6:18 AM UTC-12 local
On February 18, 2025 at 18:18 UTC, a magnitude 4.1 deep-focus earthquake struck 285 km WNW of Houma, Tonga, at a depth of 536.7 km and coordinates -20.4086°, -177.9263°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-177.9263°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Houma, Tonga?
The magnitude 4.1 earthquake that struck 285 km WNW of Houma, Tonga on February 18, 2025 at 18:18 UTC had a depth of 536.7 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000pvn5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, February 18, 2025). M4.1 Earthquake 285 km WNW of Houma, Tonga — February 18, 2025. Retrieved May 2, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000pvn5/