M4.8 Earthquake 99 km WNW of Copiapó, Chile — August 11, 2025
2025-08-11 19:36:39 UTC (2025-08-11) · approx. 2:36 PM UTC-5 local
Felt by 1 person across nearby locations.
On August 11, 2025 at 19:36 UTC, a magnitude 4.8 shallow crustal earthquake struck 99 km WNW of Copiapó, Chile, at a depth of 21.2 km and coordinates -26.8737°, -71.1662°. This earthquake was detected by 49 seismic stations with good location accuracy and was assigned a USGS significance rating of 355, placing it among routine seismic activity.
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.
The epicenter is located in Chile, a region characterized by the Peru-Chile Trench, where the Nazca Plate subducts beneath South America at 65-80 mm per year. The nearest mapped fault system is the Peru-Chile Trench. View all earthquakes in Chile.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-71.1662°E
Technical Information
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Common Questions
How strong was the magnitude 4.8 earthquake near Copiapó, Chile?
The magnitude 4.8 earthquake that struck 99 km WNW of Copiapó, Chile on August 11, 2025 at 19:36 UTC had a depth of 21.2 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -26.8737°, -71.1662°, which is 99 km WNW of Copiapó, Chile. View all earthquakes in Chile.
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.
Has Chile had earthquakes this big before?
The largest recorded earthquake in Chile was the M9.5 Great Chilean earthquake of May 22, 1960. Today's magnitude 4.8 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000qzvz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 11, 2025). M4.8 Earthquake 99 km WNW of Copiapó, Chile — August 11, 2025. Retrieved October 25, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qzvz/