M4.5 Earthquake 36 km WSW of Port-Vila, Vanuatu — March 18, 2025
2025-03-18 20:57:57 UTC (2025-03-18) · approx. 7:57 AM UTC+11 local
On March 18, 2025 at 20:57 UTC, a magnitude 4.5 shallow crustal earthquake struck 36 km WSW of Port-Vila, Vanuatu, at a depth of 35.0 km and coordinates -17.8706°, 168.0027°. This earthquake was detected by 24 seismic stations with moderate location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Vanuatu, a region characterized by the New Hebrides subduction zone, where the Australian Plate subducts eastward at approximately 90 mm per year. View all earthquakes in Vanuatu.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
168.0027°E
Technical Information
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Common Questions
How strong was the magnitude 4.5 earthquake near Port-Vila, Vanuatu?
The magnitude 4.5 earthquake that struck 36 km WSW of Port-Vila, Vanuatu on March 18, 2025 at 20:57 UTC had a depth of 35.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -17.8706°, 168.0027°, which is 36 km WSW of Port-Vila, Vanuatu. View all earthquakes in Vanuatu.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Has Vanuatu had earthquakes this big before?
The largest recorded earthquake in Vanuatu was the M7.9 Vanuatu earthquake of October 7, 2009. Today's magnitude 4.5 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000pn3d). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, March 18, 2025). M4.5 Earthquake 36 km WSW of Port-Vila, Vanuatu — March 18, 2025. Retrieved May 17, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pn3d/