M4.6 Earthquake 54 km SE of Londres, Argentina — July 26, 2026
2026-07-26 17:29:13 UTC (2026-07-26) · approx. 1:29 PM UTC-4 local
On July 26, 2026 at 17:29 UTC, a magnitude 4.6 intermediate depth earthquake struck 54 km SE of Londres, Argentina, at a depth of 156.1 km and coordinates -27.9949°, -66.6801°. This earthquake was detected by 37 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.6801°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.6 earthquake near Londres, Argentina?
The magnitude 4.6 earthquake that struck 54 km SE of Londres, Argentina on July 26, 2026 at 17:29 UTC had a depth of 156.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -27.9949°, -66.6801°, which is 54 km SE of Londres, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000t3ia). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 26, 2026). M4.6 Earthquake 54 km SE of Londres, Argentina — July 26, 2026. Retrieved August 9, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t3ia/