M4.6 Earthquake 21 km SSE of San Pedro de Atacama, Chile — November 8, 2023
2023-11-08 23:45:51 UTC (2023-11-08) · approx. 6:45 PM UTC-5 local
On November 8, 2023 at 23:45 UTC, a magnitude 4.6 intermediate depth earthquake struck 21 km SSE of San Pedro de Atacama, Chile, at a depth of 124.6 km and coordinates -23.0784°, -68.0993°. This earthquake was detected by 53 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Chile, a region characterized by the Peru-Chile Trench, where the Nazca Plate subducts beneath South America at 65-80 mm per year. The nearest mapped fault system is the Peru-Chile Trench. View all earthquakes in Chile.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
-68.0993°E
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Common Questions
How strong was the magnitude 4.6 earthquake near San Pedro de Atacama, Chile?
The magnitude 4.6 earthquake that struck 21 km SSE of San Pedro de Atacama, Chile on November 8, 2023 at 23:45 UTC had a depth of 124.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -23.0784°, -68.0993°, which is 21 km SSE of San Pedro de Atacama, Chile. View all earthquakes in Chile.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Has Chile had earthquakes this big before?
The largest recorded earthquake in Chile was the M9.5 Great Chilean earthquake of May 22, 1960. Today's magnitude 4.6 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us7000l9qs). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, November 8, 2023). M4.6 Earthquake 21 km SSE of San Pedro de Atacama, Chile — November 8, 2023. Retrieved January 13, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000l9qs/