Pompeii was known from early historical times from the writing of Pliny the Younger, an eye witness to the eruption. Although there was some knowledge of the site from 1599 its magnitude was better understood from 1748.
30S 90E = None of the above. It's in the Indian Ocean (They could have meant 30S 90W. That's in the Pacific Ocean, which is on the list but hasn't been used).
