M4.9 Earthquake 210 km WNW of Lautoka, Fiji — January 18, 2023
2023-01-18 20:07:40 UTC (2023-01-18) · approx. 8:07 AM UTC+12 local
On January 18, 2023 at 20:07 UTC, a magnitude 4.9 shallow crustal earthquake struck 210 km WNW of Lautoka, Fiji, at a depth of 10.0 km and coordinates -17.1760°, 175.5265°. This earthquake was detected by 28 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Fiji, a region characterized by the Fiji Fracture Zone at the junction of the Pacific and Australian plates, with deep-focus seismicity from the subducted slab. View all earthquakes in Fiji.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
175.5265°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Lautoka, Fiji?
The magnitude 4.9 earthquake that struck 210 km WNW of Lautoka, Fiji on January 18, 2023 at 20:07 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -17.1760°, 175.5265°, which is 210 km WNW of Lautoka, Fiji. View all earthquakes in Fiji.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Authoritative source: USGS event page (event ID: us7000j5bm). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, January 18, 2023). M4.9 Earthquake 210 km WNW of Lautoka, Fiji — January 18, 2023. Retrieved March 31, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000j5bm/