M4.4 Earthquake 45 km SW of Cachí, Argentina — September 15, 2026
2026-09-15 17:41:25 UTC (2026-09-15) · approx. 1:41 PM UTC-4 local
On September 15, 2026 at 17:41 UTC, a magnitude 4.4 intermediate depth earthquake struck 45 km SW of Cachí, Argentina, at a depth of 191.0 km and coordinates -25.4271°, -66.4652°.
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
-66.4652°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.4 earthquake near Cachí, Argentina?
The magnitude 4.4 earthquake that struck 45 km SW of Cachí, Argentina on September 15, 2026 at 17:41 UTC had a depth of 191.0 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 4.4 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000thni). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 15, 2026). M4.4 Earthquake 45 km SW of Cachí, Argentina — September 15, 2026. Retrieved September 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000thni/