Im going with volcano, even above and beyond earthquake which I did not see listed in the poll options.
The majority of the other options were types of storms and while storms can be quite nasty they usually have less long lassting effects on the natives than geologic disasters.
But I am still holding out for the big damn rock from space to be the mother of all disasters. Something even bigger than the biggest 'butt rock' dropped by all the transplanted welsh banana benders in the world . L

L
Then too there's always that volanic island off the coast of africa Which, we're informed, has the potential to send a 500 meter wave crashing into the East coast from Miami to Maine.
Gotta tell you if
that happens, it's gonna leave a
helluva mark.