M5.0 Earthquake in the La Rioja-Cordoba border region, Argentina — February 28, 2023
2023-02-28 04:49:54 UTC (2023-02-28) · approx. 12:49 AM UTC-4 local
On February 28, 2023 at 04:49 UTC, a magnitude 5.0 shallow crustal earthquake struck in the La Rioja-Cordoba border region, Argentina, at a depth of 10.4 km and coordinates -31.1845°, -65.8028°. This earthquake was detected by 45 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 385, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.0 releases seismic energy equivalent to roughly 477 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.7 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-65.8028°E
Technical Information
Common Questions
How strong was the magnitude 5.0 earthquake in the La Rioja-Cordoba border region, Argentina?
The magnitude 5.0 earthquake that struck in the La Rioja-Cordoba border region, Argentina on February 28, 2023 at 04:49 UTC had a depth of 10.4 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -31.1845°, -65.8028°, which is in the La Rioja-Cordoba border region, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.0 earthquakes can continue for days to weeks and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000jg65). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 28, 2023). M5.0 Earthquake in the La Rioja-Cordoba border region, Argentina — February 28, 2023. Retrieved May 8, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jg65/