M4.3 Earthquake 237 km SSE of Ushuaia, Argentina — May 11, 2025
2025-05-11 16:56:32 UTC (2025-05-11) · approx. 12:56 PM UTC-4 local
On May 11, 2025 at 16:56 UTC, a magnitude 4.3 shallow crustal earthquake struck 237 km SSE of Ushuaia, Argentina, at a depth of 10.0 km and coordinates -56.8826°, -67.4457°.
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
-67.4457°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Ushuaia, Argentina?
The magnitude 4.3 earthquake that struck 237 km SSE of Ushuaia, Argentina on May 11, 2025 at 16:56 UTC had a depth of 10.0 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 4.3 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: us7000pypa). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, May 11, 2025). M4.3 Earthquake 237 km SSE of Ushuaia, Argentina — May 11, 2025. Retrieved July 24, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pypa/