M4.3 Earthquake 3 km SSW of General Mosconi, Argentina — September 19, 2026
2026-09-19 22:53:36 UTC (5 hours ago) · approx. 6:53 PM UTC-4 local
On September 19, 2026 at 22:53 UTC, a magnitude 4.3 deep-focus earthquake struck 3 km SSW of General Mosconi, Argentina, at a depth of 535.6 km and coordinates -22.6253°, -63.8289°.
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
-63.8289°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near General Mosconi, Argentina?
The magnitude 4.3 earthquake that struck 3 km SSW of General Mosconi, Argentina on September 19, 2026 at 22:53 UTC had a depth of 535.6 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.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000tim6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 19, 2026). M4.3 Earthquake 3 km SSW of General Mosconi, Argentina — September 19, 2026. Retrieved September 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tim6/