Not sure about the pestilence or plague but wind definitely (and that's not just due to the change of diet) and definitely earthquakes....although 83 in a day seems a bit extreme !
We've sat through one (4.7 on the Richter scale) in the Ostraca bar and, last year, woke up to a 5.7 where the epicentre was just under Gavdos Island.....so if you see things rocking or shaking it's not just the after effects of the raki. It is a bit of an odd sensation (if you do pick up on it) but most of the locals barely notice....they're used to it. Made a couple of my geology friends very jealous !
Souda is lovely....I can heartily recommend it...and it's usually quieter than the other beaches.