If I recall correctly, an earthquake caused a tsunami which destroyed the Etruscan civilization. Etruscans were located near the sea shore. Wonderful for trade and sea food. Bad if there was a tidal wave.
Nope, although the seismic activity in Italy makes such an explanation plausible. During Roman times however:
https://www.romanports.org/en/articles/ports-in-focus/533-the-lost-harbour-of-pisa.html
The Roman Empire probably wouldn’t have arisen had Rome not been attacked over and over. The wave that damaged Etruscan society was the Gallic invasion, when the Gauls had the gall to swarm down Italy and even burn down Rome (early 4th c BC). When Hannibal invaded Italy, he had Gallic allies. The freakin’ Gauls earned that eventual butt-kicking by Julius Caesar.