M4.5 Earthquake 80 km W of El Aguilar, Argentina — August 23, 2026
2026-08-23 17:56:30 UTC (31 min ago) · approx. 1:56 PM UTC-4 local
On August 23, 2026 at 17:56 UTC, a magnitude 4.5 intermediate depth earthquake struck 80 km W of El Aguilar, Argentina, at a depth of 224.8 km and coordinates -23.1294°, -66.4570°. This earthquake was detected by 38 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.4570°E
Technical Information
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Common Questions
How strong was the magnitude 4.5 earthquake near El Aguilar, Argentina?
The magnitude 4.5 earthquake that struck 80 km W of El Aguilar, Argentina on August 23, 2026 at 17:56 UTC had a depth of 224.8 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -23.1294°, -66.4570°, which is 80 km W of El Aguilar, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000tmzy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 23, 2026). M4.5 Earthquake 80 km W of El Aguilar, Argentina — August 23, 2026. Retrieved August 23, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tmzy/