Why did the Ground just shake in New Jersey?

Earthquake tremors felt in New Jersey after VA Quake

So I was sitting in my office working on a few things and I felt something that I never felt before...the ground was shaking, so was the ceiling and so was the things on my desk....In my mind I was feeling like old Fred Sandford feeling like this was the big one...

I started receiveing tweets, FB messages, text messages and phone calls because what I was feeling was not the wind but was actually after shocks and tremors from a 6.0 Earthquake that started in Virginia.  From what I hear from my network of friends is that it was felt from North Carolina to NYC down to PA and even further than that...All I can IS scary...

In Washington there were even news crews taping an event and when the felt the tremors; were seen dropping their cameras and running for cover fearing another Sept 11 type of situation.  Luckily it was not, but for now, I guess the ground isn't the only thing a little shook up from the situation.

WASHINGTON, DC just reported that a 5.9 magnitude earthquake centered northwest of Richmond, Va., shook much of Washington, D.C., and was felt as far north as Rhode Island and New York City.

The quake sent hundreds of people spilling into the street a block from the White House, with other buildings evacuated in North Carolina and tremors felt as far away as New York City.

Made me really think about the folks all over the world that suffered from something so much more serious than this...My heart goes out to them all!

**Also I am finding that anyone with T-Mobile service may not be able to reached as the tremors may have affected ground connections etc...not sure but the people that I know with T-Mobile are unable to be contacted...Crazy day!!! Did you feel it? Where are you located? Hope it didn't affect any of you too severily, take care folks!