M4.4 Earthquake 9 km ENE of Zakynthos, Greece — December 17, 2021
2021-12-17 23:28:02 UTC (2021-12-17) · approx. 12:28 AM UTC+1 local
On December 17, 2021 at 23:28 UTC, a magnitude 4.4 shallow crustal earthquake struck 9 km ENE of Zakynthos, Greece, at a depth of 10.0 km and coordinates 37.8054°, 20.9944°.
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
20.9944°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Zakynthos, Greece?
The magnitude 4.4 earthquake that struck 9 km ENE of Zakynthos, Greece on December 17, 2021 at 23:28 UTC had a depth of 10.0 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: us6000gd9p). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 17, 2021). M4.4 Earthquake 9 km ENE of Zakynthos, Greece — December 17, 2021. Retrieved March 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000gd9p/