M4.0 Earthquake in the Fiji region — August 15, 2023
2023-08-15 20:25:32 UTC (2023-08-15) · approx. 8:25 AM UTC-12 local
On August 15, 2023 at 20:25 UTC, a magnitude 4.0 deep-focus earthquake struck in the Fiji region, at a depth of 577.5 km and coordinates -19.5525°, -178.1944°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-178.1944°E
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Common Questions
How strong was the magnitude 4.0 earthquake in the Fiji region?
The magnitude 4.0 earthquake that struck in the Fiji region on August 15, 2023 at 20:25 UTC had a depth of 577.5 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000kqgf). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 15, 2023). M4.0 Earthquake in the Fiji region — August 15, 2023. Retrieved October 27, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kqgf/