M4.3 Earthquake in the Fiji region — September 30, 2023
2023-09-30 18:21:08 UTC (2023-09-30) · approx. 6:21 AM UTC-12 local
On September 30, 2023 at 18:21 UTC, a magnitude 4.3 deep-focus earthquake struck in the Fiji region, at a depth of 538.4 km and coordinates -21.2569°, -178.8441°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-178.8441°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake in the Fiji region?
The magnitude 4.3 earthquake that struck in the Fiji region on September 30, 2023 at 18:21 UTC had a depth of 538.4 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000ld6x). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 30, 2023). M4.3 Earthquake in the Fiji region — September 30, 2023. Retrieved December 9, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000ld6x/