M4.4 Earthquake in the Chile-Argentina border region — October 28, 2021
2021-10-28 23:52:46 UTC (2021-10-28) · approx. 7:52 PM UTC-4 local
On October 28, 2021 at 23:52 UTC, a magnitude 4.4 intermediate depth earthquake struck in the Chile-Argentina border region, at a depth of 199.1 km and coordinates -24.2063°, -67.3530°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-67.3530°E
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Common Questions
How strong was the magnitude 4.4 earthquake in the Chile-Argentina border region?
The magnitude 4.4 earthquake that struck in the Chile-Argentina border region on October 28, 2021 at 23:52 UTC had a depth of 199.1 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000fpk8). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 28, 2021). M4.4 Earthquake in the Chile-Argentina border region — October 28, 2021. Retrieved January 8, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000fpk8/