Tidal Waves As great as the danger to humans and the fauna and flora of the Earth that earthquakes bring, greater still is the devastation that the shifting waters will bring. There are several factors at play.
Water is more liquid than the core of the Earth, and certainly more liquid than terra firma.
Where the Earth, dragged by its core, is Shifting into a new, albeit temporary, alignment with the giant comet, its waters resist greatly. Thus the waters slosh over the nearby land, in the direction opposite to the shift. This is lessened by a tendency of the waters directly under the giant comet to rise up to meet the comet. The waters heap up, in what appear to be giant waves. This tends to lessen the sloshing over a shoreline on the comet side, but has no effect on the water's movement on the dark side of the Earth.