M4.0 Earthquake 34 km WNW of Coquimbo, Chile — January 7, 2021
2021-01-07 19:19:50 UTC (2021-01-07) · approx. 2:19 PM UTC-5 local
On January 7, 2021 at 19:19 UTC, a magnitude 4.0 shallow crustal earthquake struck 34 km WNW of Coquimbo, Chile, at a depth of 21.1 km and coordinates -29.7891°, -71.6479°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-71.6479°E
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Common Questions
How strong was the magnitude 4.0 earthquake near Coquimbo, Chile?
The magnitude 4.0 earthquake that struck 34 km WNW of Coquimbo, Chile on January 7, 2021 at 19:19 UTC had a depth of 21.1 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000d6it). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 7, 2021). M4.0 Earthquake 34 km WNW of Coquimbo, Chile — January 7, 2021. Retrieved March 13, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000d6it/