M4.5 Earthquake 41 km WNW of Barrancas, Argentina — March 23, 2023
2023-03-23 21:24:11 UTC (2023-03-23) · approx. 4:24 PM UTC-5 local
Felt by 1 person across nearby locations.
On March 23, 2023 at 21:24 UTC, a magnitude 4.5 intermediate depth earthquake struck 41 km WNW of Barrancas, Argentina, at a depth of 159.0 km and coordinates -36.6925°, -70.3526°. This earthquake was detected by 68 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 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
-70.3526°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.5 earthquake near Barrancas, Argentina?
The magnitude 4.5 earthquake that struck 41 km WNW of Barrancas, Argentina on March 23, 2023 at 21:24 UTC had a depth of 159.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -36.6925°, -70.3526°, which is 41 km WNW of Barrancas, Argentina.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000jm9s). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, March 23, 2023). M4.5 Earthquake 41 km WNW of Barrancas, Argentina — March 23, 2023. Retrieved May 26, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jm9s/