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Earthquake east of Andros

A 4.8 magnitude earthquake occurred at about 7:03 on Wednesday morning, east of the island of Andros. The earthquake was felt as far away as Evia and Attica, as well as across the Aegean islands.

According to the Geodynamic Institute of the National Observatory of Athens, the earthquake took place at a depth of about 10 kilometers.

The Mediterranean region is seismically active due to the northward convergence (4-10 mm/yr) of the African plate with respect to the Eurasian plate along a complex plate boundary. This convergence began approximately 50 Ma and was associated with the closure of the Tethys Sea.

The modern day remnant of the Tethys Sea is the Mediterranean Sea. The highest rates of seismicity in the Mediterranean region are found along the Hellenic subduction zone of southern Greece, along the North Anatolian Fault Zone of western Turkey and the Calabrian subduction zone of southern Italy. Local high rates of convergence at the Hellenic subduction zone (35mm/yr) are associated with back-arc spreading throughout Greece and western Turkey above the subducting Mediterranean oceanic crust.