Earthquake felt in Miami Beach...

[BumRushDaShow]

7. One of my former coworkers followed geology as a hobby

and he had a big topographical book of the Philly area that included faults and noted that the little creek at the bottom of my sister's Montco County property, is actually an old but still active fault that is probably a part of the ones that you are referring to.

The only other one I recall was in the early '70s that happened at night. I had a glass with a long ice teaspoon in it on a table by the bed and it suddenly started rattling. The following morning when I ran into my parents' room, my dad said we had a small earthquake.