M4.3 Earthquake south of the Kermadec Islands — August 18, 2022
2022-08-18 22:10:59 UTC (2022-08-18) · approx. 10:10 AM UTC-12 local
On August 18, 2022 at 22:10 UTC, a magnitude 4.3 shallow crustal earthquake struck south of the Kermadec Islands, at a depth of 31.1 km and coordinates -33.5724°, -178.6337°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-178.6337°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake south of the Kermadec Islands?
The magnitude 4.3 earthquake that struck south of the Kermadec Islands on August 18, 2022 at 22:10 UTC had a depth of 31.1 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000i2mu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, August 18, 2022). M4.3 Earthquake south of the Kermadec Islands — August 18, 2022. Retrieved October 28, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000i2mu/