This is well after the eruption of the volcano. Now, when was There resettled? Here is what I could find:
“Probably after what is called the Bronze Age collapse, Phoenicians founded a site on Thera. Herodotus reports that they called the island Callista and lived on it for eight generations. In the 9th century BC, Dorians founded the main Hellenic city on Mesa Vouno, 396 m (1,299 ft) above sea level. This group later claimed that they had named the city and the island after their leader, Theras. Today, that city is referred to as Ancient Thera.”
It seems that you ancestors were quite redoubtable Andy!