M4.5 Earthquake 83 km W of San Antonio de los Cobres, Argentina — September 27, 2021
2021-09-27 17:56:31 UTC (2021-09-27) · approx. 1:56 PM UTC-4 local
On September 27, 2021 at 17:56 UTC, a magnitude 4.5 intermediate depth earthquake struck 83 km W of San Antonio de los Cobres, Argentina, at a depth of 176.3 km and coordinates -24.2158°, -67.1393°.
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
-67.1393°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 83 km W of San Antonio de los Cobres, Argentina on September 27, 2021 at 17:56 UTC had a depth of 176.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -24.2158°, -67.1393°, which is 83 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: us7000fexf). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 27, 2021). M4.5 Earthquake 83 km W of San Antonio de los Cobres, Argentina — September 27, 2021. Retrieved December 4, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000fexf/