[1] The earthquake affected the eastern Roman empire during the reign of the emperor Justinian I.
According to the historian George Kedrenos (11th century), this earthquake is associated with a seismic sea wave (tsunami) which flooded the coasts of Thrace.
Before retreating to its previous position, the sea drowned many people, and caused heavy damage to the affected land areas.
The earthquake is instead recorded by the historian Theophanes the Confessor (9th century) and mentioned in a different narrative of Kedrenos.
Based on their description, the earthquake devastated Cyzicus (modern Bandırma) and damaged Constantinople.