M4.9 Earthquake south of the Kermadec Islands — November 25, 2022
2022-11-25 20:40:35 UTC (2022-11-25) · approx. 8:40 AM UTC-12 local
On November 25, 2022 at 20:40 UTC, a magnitude 4.9 shallow crustal earthquake struck south of the Kermadec Islands, at a depth of 36.5 km and coordinates -32.1457°, -178.2895°. This earthquake was detected by 28 seismic stations with good location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-178.2895°E
Technical Information
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Common Questions
How strong was the magnitude 4.9 earthquake south of the Kermadec Islands?
The magnitude 4.9 earthquake that struck south of the Kermadec Islands on November 25, 2022 at 20:40 UTC had a depth of 36.5 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -32.1457°, -178.2895°, which is south of the Kermadec Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000j5tu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, November 25, 2022). M4.9 Earthquake south of the Kermadec Islands — November 25, 2022. Retrieved January 30, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000j5tu/