M4.1 Earthquake south of the Kermadec Islands — June 23, 2025
2025-06-23 22:40:03 UTC (2025-06-23) · approx. 10:40 AM UTC+12 local
On June 23, 2025 at 22:40 UTC, a magnitude 4.1 deep-focus earthquake struck south of the Kermadec Islands, at a depth of 399.0 km and coordinates -32.3699°, 179.3824°.
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
179.3824°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake south of the Kermadec Islands?
The magnitude 4.1 earthquake that struck south of the Kermadec Islands on June 23, 2025 at 22:40 UTC had a depth of 399.0 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: us7000qaq0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, June 23, 2025). M4.1 Earthquake south of the Kermadec Islands — June 23, 2025. Retrieved September 2, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000qaq0/