M4.4 Earthquake 65 km SSW of San Pedro de Atacama, Chile — July 22, 2021
2021-07-22 19:23:35 UTC (2021-07-22) · approx. 2:23 PM UTC-5 local
On July 22, 2021 at 19:23 UTC, a magnitude 4.4 intermediate depth earthquake struck 65 km SSW of San Pedro de Atacama, Chile, at a depth of 109.6 km and coordinates -23.4181°, -68.5313°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-68.5313°E
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Common Questions
How strong was the magnitude 4.4 earthquake near San Pedro de Atacama, Chile?
The magnitude 4.4 earthquake that struck 65 km SSW of San Pedro de Atacama, Chile on July 22, 2021 at 19:23 UTC had a depth of 109.6 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000ey33). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 22, 2021). M4.4 Earthquake 65 km SSW of San Pedro de Atacama, Chile — July 22, 2021. Retrieved September 25, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000ey33/