M4.6 Earthquake in the Fiji region — September 20, 2024
2024-09-20 16:44:46 UTC (2024-09-20) · approx. 4:44 AM UTC-12 local
On September 20, 2024 at 16:44 UTC, a magnitude 4.6 deep-focus earthquake struck in the Fiji region, at a depth of 628.4 km and coordinates -18.3588°, -177.7407°. This earthquake was detected by 40 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — 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
-177.7407°E
Technical Information
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Common Questions
How strong was the magnitude 4.6 earthquake in the Fiji region?
The magnitude 4.6 earthquake that struck in the Fiji region on September 20, 2024 at 16:44 UTC had a depth of 628.4 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -18.3588°, -177.7407°, which is in the Fiji region. View all earthquakes in Fiji.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
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Location
Authoritative source: USGS event page (event ID: us6000ntbr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 20, 2024). M4.6 Earthquake in the Fiji region — September 20, 2024. Retrieved November 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000ntbr/