High Quality Content by WIKIPEDIA articles! The AD 365 Crete earthquake was an undersea earthquake that occurred at about sunrise on 21 July 365 in the Eastern Mediterranean, with an assumed epicentre near Crete. Geologists today estimate the quake to have been 8 on the Richter Scale or higher, causing widespread destruction in central and southern Greece, northern Libya, Egypt, Cyprus, and Sicily. In Crete, nearly all towns were destroyed.