M4.8 Earthquake 45 km SSW of Port-Vila, Vanuatu — September 1, 2023
2023-09-01 15:05:57 UTC (2023-09-01) · approx. 2:05 AM UTC+11 local
Felt by 13 people across nearby locations.
On September 1, 2023 at 15:05 UTC, a magnitude 4.8 shallow crustal earthquake struck 45 km SSW of Port-Vila, Vanuatu, at a depth of 35.0 km and coordinates -18.1166°, 168.1388°. This earthquake was detected by 41 seismic stations with good location accuracy and was assigned a USGS significance rating of 360, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — 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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 13 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
168.1388°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.8 earthquake near Port-Vila, Vanuatu?
The magnitude 4.8 earthquake that struck 45 km SSW of Port-Vila, Vanuatu on September 1, 2023 at 15:05 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 -18.1166°, 168.1388°, which is 45 km SSW of Port-Vila, Vanuatu. View all earthquakes in Vanuatu.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 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 4.8 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000ksnw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 1, 2023). M4.8 Earthquake 45 km SSW of Port-Vila, Vanuatu — September 1, 2023. Retrieved November 4, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000ksnw/