M4.1 Earthquake 163 km WNW of Constitución, Chile — August 15, 2025
2025-08-15 23:54:16 UTC (2025-08-15) · approx. 6:54 PM UTC-5 local
On August 15, 2025 at 23:54 UTC, a magnitude 4.1 shallow crustal earthquake struck 163 km WNW of Constitución, Chile, at a depth of 19.9 km and coordinates -34.5390°, -73.9152°.
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
-73.9152°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Constitución, Chile?
The magnitude 4.1 earthquake that struck 163 km WNW of Constitución, Chile on August 15, 2025 at 23:54 UTC had a depth of 19.9 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 4.1 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: us6000r1j4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 15, 2025). M4.1 Earthquake 163 km WNW of Constitución, Chile — August 15, 2025. Retrieved November 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000r1j4/