NOSTRADAMUS [IX.31]
The trembling of earth at Mortara the tin island of St. George half sunk;
Drowsy with peace, war will arise, at Easter in the temple abysses opened.
The tin island is Great Britain - where tin is mined, St. George is the patron
saint of England. This quatrain specifies that during the war natural calamity
will strike Britain. Earthquakes would strike it and sea water will flood a large
area. It can be assumed from here that the floods (tidal waves) and earthquakes
in Britain will result from the Comet striking the earth and as a result, Britain
will be "half-sunk" i.e. all places except the highlands of Scotland.