The relationship between quakes and tsunamis was understood (not the science, just the relationship), as seen by Poseidon Earthshaker — Greek god of the seas and quakes. In Greece, the Aegean, etc, the sea is often nearby.
Volcanoes were known and attributed to Roman Vulcan (Greek Hephaestus) but not all mountains are/were volcanoes, and the last major eruption of Vesuvius was already more than 1000 years in the past when it blew in 79 AD. The fertility of the soil was recognized, but the fact that it was a volcano was not. Whoops.
quake in 62 AD:
https://freerepublic.com/focus/chat/4258065/posts?page=10#10
Nola etc:
https://freerepublic.com/focus/news/584970/posts
https://freerepublic.com/tag/afragola/index
https://freerepublic.com/focus/chat/4235768/posts?page=3#3
Re Hephaestus/vulcan:
The Armorer of the gods, correct?
Re “… The relationship between quakes and tsunamis was understood (not the science, just the relationship…”
One has to wonder how much knowledge of natural earth science and other disciplines was lost when the great library of Alexandria burned…
Similar to when the barbarians overran Rome and destroyed everything Roman…
Cataclysmic loss of knowledge