M4.1 Earthquake 99 km NW of Copiapó, Chile — August 11, 2025
2025-08-11 20:37:01 UTC (2025-08-11) · approx. 3:37 PM UTC-5 local
On August 11, 2025 at 20:37 UTC, a magnitude 4.1 shallow crustal earthquake struck 99 km NW of Copiapó, Chile, at a depth of 20.1 km and coordinates -26.8270°, -71.1303°.
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
-71.1303°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Copiapó, Chile?
The magnitude 4.1 earthquake that struck 99 km NW of Copiapó, Chile on August 11, 2025 at 20:37 UTC had a depth of 20.1 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: us6000qzyw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 11, 2025). M4.1 Earthquake 99 km NW of Copiapó, Chile — August 11, 2025. Retrieved October 25, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qzyw/