This 2011 earthquakes map, rendered in Google Earth, shows just how rare seismic events are on the East Coast:

View larger version
UPDATE: Adding historical data I discover…
This map shows earthquake hazards in various parts of the country:
The resulting maps are derived from seismic hazard curves calculated on a grid of sites across the United States that describe the frequency of exceeding a set of ground motions.

View larger version
This map uses symbols and colors to visualize the “seismicity” of the lower 48 states:

Source: USGS