M5.2 Earthquake 100 km SSW of Isangel, Vanuatu — December 23, 2023
2023-12-23 20:43:45 UTC (2023-12-23) · approx. 7:43 AM UTC+11 local
On December 23, 2023 at 20:43 UTC, a magnitude 5.2 shallow crustal earthquake struck 100 km SSW of Isangel, Vanuatu, at a depth of 10.0 km and coordinates -20.3914°, 168.9535°. This earthquake was detected by 52 seismic stations with good location accuracy and was assigned a USGS significance rating of 416, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.2 releases seismic energy equivalent to roughly 951 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.3 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
Earthquake Details
168.9535°E
Technical Information
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Common Questions
How strong was the magnitude 5.2 earthquake near Isangel, Vanuatu?
The magnitude 5.2 earthquake that struck 100 km SSW of Isangel, Vanuatu on December 23, 2023 at 20:43 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -20.3914°, 168.9535°, which is 100 km SSW of Isangel, Vanuatu. View all earthquakes in Vanuatu.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.2 earthquakes can continue for days to weeks 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 5.2 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000ll4n). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, December 23, 2023). M5.2 Earthquake 100 km SSW of Isangel, Vanuatu — December 23, 2023. Retrieved February 27, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000ll4n/