If you live in Northern VA you felt the rock and rolling of our earthquake a couple of months ago.  There are numerous reports of hidden chimney damage.  Especially if you have a woodburning fireplace, we urge you to have it checked out by a certified chimney inspector before you fire it up again.     Insist that the inspector use a video camera system to "scope" the fireplace.   Many woodburners have a masonry liner that are easily cracked by a disturbance such as an earthquake and a crack can lead to a chimney fire and loss of your home.   So, don't take a chance.  Pay a few bucks and keep your family safe!