M4.7 Earthquake 42 km N of Calingasta, Argentina — October 28, 2025
2025-10-28 18:17:46 UTC (2025-10-28) · approx. 1:17 PM UTC-5 local
On October 28, 2025 at 18:17 UTC, a magnitude 4.7 intermediate depth earthquake struck 42 km N of Calingasta, Argentina, at a depth of 109.0 km and coordinates -30.9493°, -69.4723°. This earthquake was detected by 61 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-69.4723°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.7 earthquake near Calingasta, Argentina?
The magnitude 4.7 earthquake that struck 42 km N of Calingasta, Argentina on October 28, 2025 at 18:17 UTC had a depth of 109.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -30.9493°, -69.4723°, which is 42 km N of Calingasta, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 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.
Authoritative source: USGS event page (event ID: us6000rk0z). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 28, 2025). M4.7 Earthquake 42 km N of Calingasta, Argentina — October 28, 2025. Retrieved May 26, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rk0z/