M4.7 Earthquake in the Kermadec Islands region — March 22, 2025
2025-03-22 20:37:23 UTC (2025-03-22) · approx. 8:37 AM UTC+12 local
On March 22, 2025 at 20:37 UTC, a magnitude 4.7 deep-focus earthquake struck in the Kermadec Islands region, at a depth of 571.3 km and coordinates -27.6350°, 178.6482°. This earthquake was detected by 63 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
178.6482°E
Technical Information
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Common Questions
How strong was the magnitude 4.7 earthquake in the Kermadec Islands region?
The magnitude 4.7 earthquake that struck in the Kermadec Islands region on March 22, 2025 at 20:37 UTC had a depth of 571.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -27.6350°, 178.6482°, which is in the Kermadec Islands region.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000plww). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, March 22, 2025). M4.7 Earthquake in the Kermadec Islands region — March 22, 2025. Retrieved May 29, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000plww/