M4.3 Earthquake 110 km WSW of Abra Pampa, Argentina — December 31, 2020
2020-12-31 21:13:14 UTC (2020-12-31) · approx. 5:13 PM UTC-4 local
On December 31, 2020 at 21:13 UTC, a magnitude 4.3 intermediate depth earthquake struck 110 km WSW of Abra Pampa, Argentina, at a depth of 284.3 km and coordinates -22.9389°, -66.7445°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.7445°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Abra Pampa, Argentina?
The magnitude 4.3 earthquake that struck 110 km WSW of Abra Pampa, Argentina on December 31, 2020 at 21:13 UTC had a depth of 284.3 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000d4mx). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 31, 2020). M4.3 Earthquake 110 km WSW of Abra Pampa, Argentina — December 31, 2020. Retrieved March 6, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000d4mx/