M4.2 Earthquake 118 km NNW of San Antonio de los Cobres, Argentina — September 9, 2020
2020-09-09 21:47:08 UTC (2020-09-09) · approx. 5:47 PM UTC-4 local
On September 9, 2020 at 21:47 UTC, a magnitude 4.2 intermediate depth earthquake struck 118 km NNW of San Antonio de los Cobres, Argentina, at a depth of 212.6 km and coordinates -23.3046°, -66.9185°.
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
-66.9185°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near San Antonio de los Cobres, Argentina?
The magnitude 4.2 earthquake that struck 118 km NNW of San Antonio de los Cobres, Argentina on September 9, 2020 at 21:47 UTC had a depth of 212.6 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 4.2 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000bkr0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, September 9, 2020). M4.2 Earthquake 118 km NNW of San Antonio de los Cobres, Argentina — September 9, 2020. Retrieved November 21, 2020 from https://www.earthquaketracker.org/earthquakes/event/us7000bkr0/