Looks like some others weighed in and explained that Crete was the “big island” and Thera was probably the hub. I am working on a novel set on Thera a few generations before the explosion and have about every book published in English I can find, so I had to jump in there! ;)
It is a segment of history I don’t know much about, and is one of the reasons I enjoy FR so much, is that it opens doors for me in literature, entertainment, history and politics that I might not have entered on my own...
Good luck with your work!
I too am working on a book. This one on the eruption of Pelee on Martinique in 1902, and the series of volcanoes that year all around the Caribbean Plate. If you care to communicate Private Message, I would be interested.