M4.6 Earthquake 59 km WNW of San Antonio de los Cobres, Argentina — September 23, 2026
2026-09-23 16:48:37 UTC (9 hours ago) · approx. 12:48 PM UTC-4 local
On September 23, 2026 at 16:48 UTC, a magnitude 4.6 intermediate depth earthquake struck 59 km WNW of San Antonio de los Cobres, Argentina, at a depth of 193.2 km and coordinates -24.0812°, -66.8891°. This earthquake was detected by 58 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
-66.8891°E
Technical Information
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Common Questions
How strong was the magnitude 4.6 earthquake near San Antonio de los Cobres, Argentina?
The magnitude 4.6 earthquake that struck 59 km WNW of San Antonio de los Cobres, Argentina on September 23, 2026 at 16:48 UTC had a depth of 193.2 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -24.0812°, -66.8891°, which is 59 km WNW of San Antonio de los Cobres, 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: us6000tx4w). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 23, 2026). M4.6 Earthquake 59 km WNW of San Antonio de los Cobres, Argentina — September 23, 2026. Retrieved September 23, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tx4w/