Seismic hazard map - it's not just a west coast thing

We're still not done with that pesky little Lancaster earthquake.

Keep going down the page there, and click on Seismic Hazard Map.

The main seismic hazard in this part of the country is from ground acceleration. The map suggests that in the Lancaster area, midway between Harrisburg and Philadelphia, there is a 20% chance that a seismic ground acceleration as high as 1/5 of gravitational acceleration will occur within a 50-year period of time. Doesn't sound all that dangerous. Any thoughts from others?

In other areas, the earthquake hazard can take on other forms.