M4.7 Earthquake 76 km ENE of Antofagasta, Chile — August 5, 2023
2023-08-05 18:09:14 UTC (2023-08-05) · approx. 1:09 PM UTC-5 local
Felt by 1 person across nearby locations.
On August 5, 2023 at 18:09 UTC, a magnitude 4.7 shallow crustal earthquake struck 76 km ENE of Antofagasta, Chile, at a depth of 64.9 km and coordinates -23.4306°, -69.6902°. This earthquake was detected by 116 seismic stations with good location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — 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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-69.6902°E
Technical Information
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Common Questions
How strong was the magnitude 4.7 earthquake near Antofagasta, Chile?
The magnitude 4.7 earthquake that struck 76 km ENE of Antofagasta, Chile on August 5, 2023 at 18:09 UTC had a depth of 64.9 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -23.4306°, -69.6902°, which is 76 km ENE of Antofagasta, Chile. View all earthquakes in Chile.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 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 4.7 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000ky58). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 5, 2023). M4.7 Earthquake 76 km ENE of Antofagasta, Chile — August 5, 2023. Retrieved October 7, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000ky58/