M3.9 Earthquake 44 km W of Ollagüe, Chile — October 28, 2023
2023-10-28 20:14:54 UTC (2023-10-28) · approx. 3:14 PM UTC-5 local
On October 28, 2023 at 20:14 UTC, a magnitude 3.9 intermediate depth earthquake struck 44 km W of Ollagüe, Chile, at a depth of 120.5 km and coordinates -21.1985°, -68.6808°.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 296 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-68.6808°E
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Common Questions
How strong was the magnitude 3.9 earthquake near Ollagüe, Chile?
The magnitude 3.9 earthquake that struck 44 km W of Ollagüe, Chile on October 28, 2023 at 20:14 UTC had a depth of 120.5 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.9 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000l78s). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 28, 2023). M3.9 Earthquake 44 km W of Ollagüe, Chile — October 28, 2023. Retrieved January 4, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000l78s/