M4.1 Earthquake 35 km ENE of Calingasta, Argentina — October 18, 2025
2025-10-18 17:13:34 UTC (2025-10-18) · approx. 12:13 PM UTC-5 local
On October 18, 2025 at 17:13 UTC, a magnitude 4.1 intermediate depth earthquake struck 35 km ENE of Calingasta, Argentina, at a depth of 115.0 km and coordinates -31.2441°, -69.0682°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-69.0682°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Calingasta, Argentina?
The magnitude 4.1 earthquake that struck 35 km ENE of Calingasta, Argentina on October 18, 2025 at 17:13 UTC had a depth of 115.0 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 4.1 earthquakes can continue for several days and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000ri1t). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 18, 2025). M4.1 Earthquake 35 km ENE of Calingasta, Argentina — October 18, 2025. Retrieved May 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000ri1t/