M4.2 Earthquake in the Fiji region — April 18, 2025
2025-04-18 19:01:21 UTC (2025-04-18) · approx. 7:01 AM UTC-12 local
On April 18, 2025 at 19:01 UTC, a magnitude 4.2 deep-focus earthquake struck in the Fiji region, at a depth of 565.2 km and coordinates -18.4452°, -177.7920°.
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
-177.7920°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake in the Fiji region?
The magnitude 4.2 earthquake that struck in the Fiji region on April 18, 2025 at 19:01 UTC had a depth of 565.2 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: us7000pwnw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 18, 2025). M4.2 Earthquake in the Fiji region — April 18, 2025. Retrieved June 27, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pwnw/