M4.8 Earthquake 79 km W of San Antonio de los Cobres, Argentina — October 23, 2021
2021-10-23 08:21:43 UTC (2021-10-23) · approx. 4:21 AM UTC-4 local
On October 23, 2021 at 08:21 UTC, a magnitude 4.8 intermediate depth earthquake struck 79 km W of San Antonio de los Cobres, Argentina, at a depth of 154.3 km and coordinates -24.1610°, -67.0943°.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-67.0943°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.8 earthquake near San Antonio de los Cobres, Argentina?
The magnitude 4.8 earthquake that struck 79 km W of San Antonio de los Cobres, Argentina on October 23, 2021 at 08:21 UTC had a depth of 154.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -24.1610°, -67.0943°, which is 79 km W of San Antonio de los Cobres, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000fwzd). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 23, 2021). M4.8 Earthquake 79 km W of San Antonio de los Cobres, Argentina — October 23, 2021. Retrieved January 8, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000fwzd/