M4.4 Earthquake 34 km SW of San Martín, Argentina — May 28, 2026
2026-05-28 03:15:50 UTC (2026-05-28) · approx. 10:15 PM UTC-5 local
On May 28, 2026 at 03:15 UTC, a magnitude 4.4 shallow crustal earthquake struck 34 km SW of San Martín, Argentina, at a depth of 10.0 km and coordinates -33.2547°, -68.7721°.
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
-68.7721°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.4 earthquake near San Martín, Argentina?
The magnitude 4.4 earthquake that struck 34 km SW of San Martín, Argentina on May 28, 2026 at 03:15 UTC had a depth of 10.0 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.
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.
Actions
Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000sp03). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, May 28, 2026). M4.4 Earthquake 34 km SW of San Martín, Argentina — May 28, 2026. Retrieved June 25, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000sp03/