As asked to little old me... and here is my answer.
It's sad but true, that nobody cares about earthquakes in this region. Your seismic risk here is totally determined by foundation type. Thus, totally safe on rock, and horrible on the drained swamps by the lake. If it is a new house, then ask about the foundation. Look around for excavations. Ask people how tough it is to put in fence poles. That sort of thing. Best is if they had to blast for a basement. :)