You know what? I do remember it! Kitty and I were at the Gray Post Office mailing a package back to a member here and we heard a big boom and somebody said "was that thunder?" and we just assumed it was. I even have the receipt and it is time stamped at 9:55 which is exactly when it happened.
One time I was driving in North Carolina and felt a weird bump. Found out later there had been an earthquake. You just don't think about them on the east side of the country!