M4.3 Earthquake 27 km S of Coquimbo, Chile — July 9, 2023
2023-07-09 22:04:11 UTC (2023-07-09) · approx. 5:04 PM UTC-5 local
On July 9, 2023 at 22:04 UTC, a magnitude 4.3 shallow crustal earthquake struck 27 km S of Coquimbo, Chile, at a depth of 49.8 km and coordinates -30.2030°, -71.2956°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-71.2956°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Coquimbo, Chile?
The magnitude 4.3 earthquake that struck 27 km S of Coquimbo, Chile on July 9, 2023 at 22:04 UTC had a depth of 49.8 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000kr7v). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 9, 2023). M4.3 Earthquake 27 km S of Coquimbo, Chile — July 9, 2023. Retrieved September 16, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kr7v/