This next Link has many useful Maps to assess risk magnitude for your area including fault lines. It comes from the DMA 2000 Hazard Mitigation Plan – Suffolk County, New York and the last pages deal with damage to that area however the info in the first part of this is usable and pertinent for anywhere in New York State .
This Link goes over some of the same information as the previous link but has a bit more detail on the effects of different size earthquakes. NYS HAZ MIT PLAN