M4.1 Earthquake 51 km NNE of Calama, Chile — October 23, 2021
2021-10-23 19:43:39 UTC (2021-10-23) · approx. 2:43 PM UTC-5 local
On October 23, 2021 at 19:43 UTC, a magnitude 4.1 intermediate depth earthquake struck 51 km NNE of Calama, Chile, at a depth of 120.7 km and coordinates -22.0535°, -68.6660°.
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
-68.6660°E
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Common Questions
How strong was the magnitude 4.1 earthquake near Calama, Chile?
The magnitude 4.1 earthquake that struck 51 km NNE of Calama, Chile on October 23, 2021 at 19:43 UTC had a depth of 120.7 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: us6000fx2q). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 23, 2021). M4.1 Earthquake 51 km NNE of Calama, Chile — October 23, 2021. Retrieved January 8, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000fx2q/