I have no faith in the stability of these links, but they should show a live feed of the Toronto aquarium.
We have no experience on what happens to a big aquarium when the PGV rises. I think they are probably like large oil tanks. We might expect cracks at 20 cm/s, and seam rupture at 50 cm/s.
Of all the big aquariums, Boston is at highest risk. It is probably on a typical raft foundation over Blue Clay, and the design is a big cylindrical oil tank. I don't think people are at any more risk than a nearby Costco on the same stuff.
Chicago has the least risk, and Toronto is somewhere in between. I'm interested in Toronto because of the quasi-rock it is on. When the CN tower was being designed, they drilled 3 exploration holes, large enough to lower a junior geotechnical engineer. It was in badly mangled shale. In fact, there was no bedding similarity with all three holes. They ended up pouring the foundation on the least-bad rock layer, above another clay seam. The aquarium is on the same stuff. So, is it rock or soft soil? We'll never know.
*Note that any earthquake strong enough to bust an aquarium will be such that we don't care. :)