M4.1 Earthquake in the Fiji region — July 18, 2023
2023-07-18 17:19:35 UTC (2023-07-18) · approx. 5:19 AM UTC-12 local
On July 18, 2023 at 17:19 UTC, a magnitude 4.1 deep-focus earthquake struck in the Fiji region, at a depth of 533.8 km and coordinates -19.2179°, -177.3857°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-177.3857°E
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Common Questions
How strong was the magnitude 4.1 earthquake in the Fiji region?
The magnitude 4.1 earthquake that struck in the Fiji region on July 18, 2023 at 17:19 UTC had a depth of 533.8 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000kvph). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 18, 2023). M4.1 Earthquake in the Fiji region — July 18, 2023. Retrieved September 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kvph/