M4.5 Earthquake 100 km W of San Antonio de los Cobres, Argentina — August 16, 2026
2026-08-16 21:06:07 UTC (1 hour ago) · approx. 5:06 PM UTC-4 local
On August 16, 2026 at 21:06 UTC, a magnitude 4.5 intermediate depth earthquake struck 100 km W of San Antonio de los Cobres, Argentina, at a depth of 173.8 km and coordinates -24.3041°, -67.3083°. This earthquake was detected by 40 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
-67.3083°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near San Antonio de los Cobres, Argentina?
The magnitude 4.5 earthquake that struck 100 km W of San Antonio de los Cobres, Argentina on August 16, 2026 at 21:06 UTC had a depth of 173.8 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -24.3041°, -67.3083°, which is 100 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.
Authoritative source: USGS event page (event ID: usd0015ea6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 16, 2026). M4.5 Earthquake 100 km W of San Antonio de los Cobres, Argentina — August 16, 2026. Retrieved August 16, 2026 from https://www.earthquaketracker.org/earthquakes/event/usd0015ea6/