In your message you say "There is so much steel built into the houses in Greece that it would be almost impossible for much damage to happen nowadays except in the old houses where a ringbeam has not yet been put in."
Have you already forgotten all the Greeks who were killed or injured a couple of years ago in the earthquake in Athens? Many were in new blocks and buildings.There are still thousands in temporary accomodation , living in makeshift shelters and tents. Or did you never hear about that quake?
No one should worry without cause, but all should be prepared and know what to do if the worst should happen.......