From the Null Space archives on earthquakes in Pittsburgh
. Commenters here have said the closest fault is actually under Erie, and thus not something to worry about. I am not a geologist so I can't add value to that evaluation in itself. The fact that an aftershock was felt in the region at least raises a few questions. Even if the general risk is low, there are some things to think about. Not all regions are as earthquake-tolerant as others and what would be benign elsewhere might have more impact here. I'm pretty sure a 5.8 earthquake might not even make it into the local news in Tokyo. Pittsburgh, on the other hand, has an infrastructure that is a bit less prepared than the situation across the Kanto plain. I would bet the greatest risk from even some moderate shaking probably lies with... yup... the PWSA. Probably takes a lot less shaking here to have impacts on some of our archaic pipes than in a system which has had more investment over the
century. As I went into in the old post, the smaller earthquake near Pymuntang, north of Pittsburgh, had a palpable impact on the water table, and thus local well water and as a result even an impact on some some specialized local labor markets.
and these days Pennsylvania has a lot more pipes in the ground eh?