M4.2 Earthquake 37 km WSW of Andacollo, Argentina — April 20, 2024
2024-04-20 18:23:45 UTC (2024-04-20) · approx. 1:23 PM UTC-5 local
On April 20, 2024 at 18:23 UTC, a magnitude 4.2 intermediate depth earthquake struck 37 km WSW of Andacollo, Argentina, at a depth of 140.1 km and coordinates -37.2628°, -71.0798°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-71.0798°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Andacollo, Argentina?
The magnitude 4.2 earthquake that struck 37 km WSW of Andacollo, Argentina on April 20, 2024 at 18:23 UTC had a depth of 140.1 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000mt0d). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, April 20, 2024). M4.2 Earthquake 37 km WSW of Andacollo, Argentina — April 20, 2024. Retrieved June 25, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000mt0d/