M4.4 Earthquake 33 km SW of Port-Vila, Vanuatu — September 28, 2025
2025-09-28 22:18:34 UTC (2025-09-28) · approx. 9:18 AM UTC+11 local
On September 28, 2025 at 22:18 UTC, a magnitude 4.4 shallow crustal earthquake struck 33 km SW of Port-Vila, Vanuatu, at a depth of 35.0 km and coordinates -17.9520°, 168.0955°.
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
168.0955°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Port-Vila, Vanuatu?
The magnitude 4.4 earthquake that struck 33 km SW of Port-Vila, Vanuatu on September 28, 2025 at 22:18 UTC had a depth of 35.0 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 4.4 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: us6000ribi). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 28, 2025). M4.4 Earthquake 33 km SW of Port-Vila, Vanuatu — September 28, 2025. Retrieved December 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000ribi/