M4.5 Earthquake 71 km W of San Antonio de los Cobres, Argentina — September 12, 2025
2025-09-12 23:49:37 UTC (2025-09-12) · approx. 7:49 PM UTC-4 local
On September 12, 2025 at 23:49 UTC, a magnitude 4.5 intermediate depth earthquake struck 71 km W of San Antonio de los Cobres, Argentina, at a depth of 186.2 km and coordinates -24.2635°, -67.0219°. This earthquake was detected by 37 seismic stations with excellent 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
-67.0219°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.5 earthquake near San Antonio de los Cobres, Argentina?
The magnitude 4.5 earthquake that struck 71 km W of San Antonio de los Cobres, Argentina on September 12, 2025 at 23:49 UTC had a depth of 186.2 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -24.2635°, -67.0219°, which is 71 km W of San Antonio de los Cobres, 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.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us7000qvvh). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 12, 2025). M4.5 Earthquake 71 km W of San Antonio de los Cobres, Argentina — September 12, 2025. Retrieved May 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000qvvh/