At https://archaeologynewsnetwork.blogspot.com/2019/11/results-of-recent-ex… … excavations at Gla in Boeotia are ongoing. The prime stage of occupation dates back to the Mycenaean era (LB age) and it was destroyed in a spectacular conflagration – or that was the considered opinion of archaeologists during an earlier excavation. This aspect is left unmentioned (in the press release at least) but it is worth bearing in mind as many other Mycenaean cities and towns were subject to destruction at the same point in time. Gla was built on a natural rock outcrop and fortified with a wall. It became a refuge during hostilities for the local agricultural communities. It also served as a flood control centre. The settlement area is around 50 acres and the well preserved wall runs for a length of 3km with a thickness of nearly 67m. It was a formidable site and the wall has survived whatever conflagration brought Gla to an end.
… one can see that earthquake is not a likely explanation.
At https://archaeologynewsnetwork.blogspot.com/2019/11/minoan-settlement-un… … a Minoan settlement found on an island offshore of Crete. It had a flourishing economy it would seem …