M4.3 Earthquake 32 km NNW of Ancud, Chile — August 28, 2023
2023-08-28 17:48:19 UTC (2023-08-28) · approx. 12:48 PM UTC-5 local
On August 28, 2023 at 17:48 UTC, a magnitude 4.3 shallow crustal earthquake struck 32 km NNW of Ancud, Chile, at a depth of 35.0 km and coordinates -41.6027°, -73.9596°.
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
-73.9596°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near Ancud, Chile?
The magnitude 4.3 earthquake that struck 32 km NNW of Ancud, Chile on August 28, 2023 at 17:48 UTC had a depth of 35.0 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: us7000krj0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 28, 2023). M4.3 Earthquake 32 km NNW of Ancud, Chile — August 28, 2023. Retrieved November 4, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000krj0/