M3.8 Earthquake 47 km SSW of San Martín, Argentina — November 5, 2023
2023-11-05 12:30:33 UTC (2023-11-05) · approx. 7:30 AM UTC-5 local
On November 5, 2023 at 12:30 UTC, a magnitude 3.8 shallow crustal earthquake struck 47 km SSW of San Martín, Argentina, at a depth of 49.9 km and coordinates -33.4731°, -68.6848°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-68.6848°E
Technical Information
Common Questions
How strong was the magnitude 3.8 earthquake near San Martín, Argentina?
The magnitude 3.8 earthquake that struck 47 km SSW of San Martín, Argentina on November 5, 2023 at 12:30 UTC had a depth of 49.9 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000l903). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, November 5, 2023). M3.8 Earthquake 47 km SSW of San Martín, Argentina — November 5, 2023. Retrieved January 13, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000l903/