M4.0 Earthquake 71 km SSW of Atocha, Bolivia — September 27, 2023
2023-09-27 23:02:38 UTC (2023-09-27) · approx. 7:02 PM UTC-4 local
On September 27, 2023 at 23:02 UTC, a magnitude 4.0 intermediate depth earthquake struck 71 km SSW of Atocha, Bolivia, at a depth of 234.7 km and coordinates -21.4801°, -66.5898°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.5898°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Atocha, Bolivia?
The magnitude 4.0 earthquake that struck 71 km SSW of Atocha, Bolivia on September 27, 2023 at 23:02 UTC had a depth of 234.7 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000lb8i). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 27, 2023). M4.0 Earthquake 71 km SSW of Atocha, Bolivia — September 27, 2023. Retrieved December 9, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000lb8i/