M4.4 Earthquake 55 km WNW of San Antonio de los Cobres, Argentina — February 13, 2021
2021-02-13 21:12:21 UTC (2021-02-13) · approx. 5:12 PM UTC-4 local
On February 13, 2021 at 21:12 UTC, a magnitude 4.4 intermediate depth earthquake struck 55 km WNW of San Antonio de los Cobres, Argentina, at a depth of 212.9 km and coordinates -23.9581°, -66.7840°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.7840°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near San Antonio de los Cobres, Argentina?
The magnitude 4.4 earthquake that struck 55 km WNW of San Antonio de los Cobres, Argentina on February 13, 2021 at 21:12 UTC had a depth of 212.9 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000dhh6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, February 13, 2021). M4.4 Earthquake 55 km WNW of San Antonio de los Cobres, Argentina — February 13, 2021. Retrieved April 23, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000dhh6/