M4.5 Earthquake 51 km S of Calingasta, Argentina — October 27, 2026
2026-10-27 11:19:39 UTC (1 day ago) · approx. 6:19 AM UTC-5 local
On October 27, 2026 at 11:19 UTC, a magnitude 4.5 intermediate depth earthquake struck 51 km S of Calingasta, Argentina, at a depth of 112.8 km and coordinates -31.7949°, -69.5043°. This earthquake was detected by 42 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-69.5043°E
Technical Information
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Common Questions
How strong was the magnitude 4.5 earthquake near Calingasta, Argentina?
The magnitude 4.5 earthquake that struck 51 km S of Calingasta, Argentina on October 27, 2026 at 11:19 UTC had a depth of 112.8 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -31.7949°, -69.5043°, which is 51 km S of Calingasta, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000ttfm). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 27, 2026). M4.5 Earthquake 51 km S of Calingasta, Argentina — October 27, 2026. Retrieved October 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000ttfm/