M4.2 Earthquake 91 km WSW of Copiapó, Chile — December 13, 2023
2023-12-13 21:25:55 UTC (2023-12-13) · approx. 4:25 PM UTC-5 local
On December 13, 2023 at 21:25 UTC, a magnitude 4.2 shallow crustal earthquake struck 91 km WSW of Copiapó, Chile, at a depth of 28.6 km and coordinates -27.7315°, -71.1600°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-71.1600°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Copiapó, Chile?
The magnitude 4.2 earthquake that struck 91 km WSW of Copiapó, Chile on December 13, 2023 at 21:25 UTC had a depth of 28.6 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000liru). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, December 13, 2023). M4.2 Earthquake 91 km WSW of Copiapó, Chile — December 13, 2023. Retrieved February 17, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000liru/