M4.3 Earthquake 109 km W of San Antonio de los Cobres, Argentina — July 26, 2026
2026-07-26 21:44:07 UTC (1 hour ago) · approx. 5:44 PM UTC-4 local
On July 26, 2026 at 21:44 UTC, a magnitude 4.3 intermediate depth earthquake struck 109 km W of San Antonio de los Cobres, Argentina, at a depth of 183.7 km and coordinates -24.4024°, -67.3754°.
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
-67.3754°E
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Common Questions
How strong was the magnitude 4.3 earthquake near San Antonio de los Cobres, Argentina?
The magnitude 4.3 earthquake that struck 109 km W of San Antonio de los Cobres, Argentina on July 26, 2026 at 21:44 UTC had a depth of 183.7 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: us7000t3ji). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 26, 2026). M4.3 Earthquake 109 km W of San Antonio de los Cobres, Argentina — July 26, 2026. Retrieved July 26, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t3ji/