Thursday 20 January 2022

Magnitude 5.3 Earthquake off the Athos Peninsula, Greece.

The United States Geological Survey recorded a Magnitude 5.3 Earthquake at a depth of 9.3 km, beneath the Aegean Sea, off the south coast of the Athos Peninsula in northeast Greece, slightly before 1.50 pm local time (slightly before 11.50 am GMT) on Sunday 16 January 2022. No damage or injuries have been reported following this event, but people have reported feeling the event from much of Chalkidiki and Thessaloniki. 

The approximate location of the 16 January 2022 Greek Earthquake. USGS.

The Aegean Sea is underlain by the Aegean Sea Plate, a small tectonic plate caught between the African Plate to the south, the Anatolian Plate to the east and the Eurasian Plate to the northwest. The Anatolian Plate is being pushed to the west by the northward movement of the Arabian Plate to the east, pushing the Aegean Plate south and west into collision with the northward moving African Plate. Part of the African Plate is being subducted beneath the Aegean Plate along the Hellenic Trench, which runs to the south of the Greek Islands from Cyprus to Crete then northwest under the Ionian sea parallel to the Peloponnesian Coast. This is not a smooth process, as the plates frequently stick together then break apart once the pressure has built up sufficiently, leading to (fairly frequent) Earthquakes.
 
Simplified map of the plate movements of the eastern Mediterranean. Univeriteit Utrecht.

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