M4.0 Earthquake 17 km SSW of Kéfalos, Greece — January 6, 2021
2021-01-06 21:29:55 UTC (2021-01-06) · approx. 11:29 PM UTC+2 local
On January 6, 2021 at 21:29 UTC, a magnitude 4.0 intermediate depth earthquake struck 17 km SSW of Kéfalos, Greece, at a depth of 139.7 km and coordinates 36.5926°, 26.8999°.
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
26.8999°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.0 earthquake near Kéfalos, Greece?
The magnitude 4.0 earthquake that struck 17 km SSW of Kéfalos, Greece on January 6, 2021 at 21:29 UTC had a depth of 139.7 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: us6000d6a5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 6, 2021). M4.0 Earthquake 17 km SSW of Kéfalos, Greece — January 6, 2021. Retrieved March 13, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000d6a5/