M4.2 Earthquake 266 km SSW of ‘Ohonua, Tonga — May 7, 2023
2023-05-07 21:15:16 UTC (2023-05-07) · approx. 9:15 AM UTC-12 local
On May 7, 2023 at 21:15 UTC, a magnitude 4.2 deep-focus earthquake struck 266 km SSW of ‘Ohonua, Tonga, at a depth of 332.1 km and coordinates -23.4235°, -176.2638°.
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
-176.2638°E
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Common Questions
How strong was the magnitude 4.2 earthquake near ‘Ohonua, Tonga?
The magnitude 4.2 earthquake that struck 266 km SSW of ‘Ohonua, Tonga on May 7, 2023 at 21:15 UTC had a depth of 332.1 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 4.2 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: us6000kb5s). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, May 7, 2023). M4.2 Earthquake 266 km SSW of ‘Ohonua, Tonga — May 7, 2023. Retrieved July 22, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kb5s/