I'm not really worried about after. But if there's any way to minimize potential damage ahead of time, it might be nice. Lids to keep sloshing down, sure. But how do larger tanks handle back and forth shimmying? Does it stress seams? Would it be pointless to attach a tall stand with a tall tank to a stud like one is supposed to do with other top-heavy items? My tanks appear more susceptible to damage from prolonged shaking than anything else I have, and I wouldn't be surprised to have tank failure before anything else was damaged.
I'm not concerned about saving my tanks from a 7.0. It's the smaller ones where the world won't be ending, but I still won't want 200 gallons of water on my floor, along with my little girl's favorite pets and a lot of glass.