M4.6 Earthquake 100 km W of El Aguilar, Argentina — October 27, 2026
2026-10-27 11:41:22 UTC (1 hour ago) · approx. 7:41 AM UTC-4 local
On October 27, 2026 at 11:41 UTC, a magnitude 4.6 intermediate depth earthquake struck 100 km W of El Aguilar, Argentina, at a depth of 206.3 km and coordinates -23.1819°, -66.6616°. This earthquake was detected by 56 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.6616°E
Technical Information
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Common Questions
How strong was the magnitude 4.6 earthquake near El Aguilar, Argentina?
The magnitude 4.6 earthquake that struck 100 km W of El Aguilar, Argentina on October 27, 2026 at 11:41 UTC had a depth of 206.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -23.1819°, -66.6616°, which is 100 km W of El Aguilar, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000ttfs). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 27, 2026). M4.6 Earthquake 100 km W of El Aguilar, Argentina — October 27, 2026. Retrieved October 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000ttfs/