M4.1 Earthquake 60 km SSE of San Agustín de Valle Fértil, Argentina — January 25, 2021
2021-01-25 21:38:30 UTC (2021-01-25) · approx. 5:38 PM UTC-4 local
On January 25, 2021 at 21:38 UTC, a magnitude 4.1 intermediate depth earthquake struck 60 km SSE of San Agustín de Valle Fértil, Argentina, at a depth of 89.1 km and coordinates -31.1563°, -67.3010°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-67.3010°E
Technical Information
Common Questions
How strong was the magnitude 4.1 earthquake near San Agustín de Valle Fértil, Argentina?
The magnitude 4.1 earthquake that struck 60 km SSE of San Agustín de Valle Fértil, Argentina on January 25, 2021 at 21:38 UTC had a depth of 89.1 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000d396). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 25, 2021). M4.1 Earthquake 60 km SSE of San Agustín de Valle Fértil, Argentina — January 25, 2021. Retrieved April 13, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000d396/