M4.3 Earthquake 20 km NW of La Serena, Chile — November 3, 2025
2025-11-03 18:00:30 UTC (2025-11-03) · approx. 1:00 PM UTC-5 local
On November 3, 2025 at 18:00 UTC, a magnitude 4.3 shallow crustal earthquake struck 20 km NW of La Serena, Chile, at a depth of 68.0 km and coordinates -29.7682°, -71.3894°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-71.3894°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near La Serena, Chile?
The magnitude 4.3 earthquake that struck 20 km NW of La Serena, Chile on November 3, 2025 at 18:00 UTC had a depth of 68.0 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rl7y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, November 3, 2025). M4.3 Earthquake 20 km NW of La Serena, Chile — November 3, 2025. Retrieved January 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rl7y/