M4.1 Earthquake 71 km NE of Calama, Chile — February 28, 2023
2023-02-28 20:10:34 UTC (2023-02-28) · approx. 3:10 PM UTC-5 local
On February 28, 2023 at 20:10 UTC, a magnitude 4.1 intermediate depth earthquake struck 71 km NE of Calama, Chile, at a depth of 141.3 km and coordinates -21.9423°, -68.5108°.
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
-68.5108°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Calama, Chile?
The magnitude 4.1 earthquake that struck 71 km NE of Calama, Chile on February 28, 2023 at 20:10 UTC had a depth of 141.3 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: us7000jgbr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 28, 2023). M4.1 Earthquake 71 km NE of Calama, Chile — February 28, 2023. Retrieved May 8, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jgbr/