M4.2 Earthquake south of the Fiji Islands — August 22, 2025
2025-08-22 18:14:28 UTC (2025-08-22) · approx. 6:14 AM UTC+12 local
On August 22, 2025 at 18:14 UTC, a magnitude 4.2 deep-focus earthquake struck south of the Fiji Islands, at a depth of 517.4 km and coordinates -24.0991°, 179.8054°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
179.8054°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake south of the Fiji Islands?
The magnitude 4.2 earthquake that struck south of the Fiji Islands on August 22, 2025 at 18:14 UTC had a depth of 517.4 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000qwr0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 22, 2025). M4.2 Earthquake south of the Fiji Islands — August 22, 2025. Retrieved November 12, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000qwr0/