M5.1 Earthquake 69 km E of Antofagasta de la Sierra, Argentina — September 5, 2026
2026-09-05 11:37:12 UTC (2 hours ago) · approx. 7:37 AM UTC-4 local
On September 5, 2026 at 11:37 UTC, a magnitude 5.1 shallow crustal earthquake struck 69 km E of Antofagasta de la Sierra, Argentina, at a depth of 10.0 km and coordinates -26.1078°, -66.7176°. This earthquake was detected by 52 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 400, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.7176°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.1 earthquake near Antofagasta de la Sierra, Argentina?
The magnitude 5.1 earthquake that struck 69 km E of Antofagasta de la Sierra, Argentina on September 5, 2026 at 11:37 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -26.1078°, -66.7176°, which is 69 km E of Antofagasta de la Sierra, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000tej2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 5, 2026). M5.1 Earthquake 69 km E of Antofagasta de la Sierra, Argentina — September 5, 2026. Retrieved September 5, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tej2/