M4.3 Earthquake 17 km SE of San Agustín de Valle Fértil, Argentina — March 28, 2025
2025-03-28 18:54:19 UTC (2025-03-28) · approx. 2:54 PM UTC-4 local
On March 28, 2025 at 18:54 UTC, a magnitude 4.3 shallow crustal earthquake struck 17 km SE of San Agustín de Valle Fértil, Argentina, at a depth of 10.0 km and coordinates -30.7520°, -67.3423°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-67.3423°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near San Agustín de Valle Fértil, Argentina?
The magnitude 4.3 earthquake that struck 17 km SE of San Agustín de Valle Fértil, Argentina on March 28, 2025 at 18:54 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 4.3 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000pnft). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, March 28, 2025). M4.3 Earthquake 17 km SE of San Agustín de Valle Fértil, Argentina — March 28, 2025. Retrieved June 6, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pnft/