In theory it could, but 3D seismic is almost always configured to look for stuff far more than a mile deep. I can't imagine these bunkers are that deep. Plus, the turnaround time from acquisition to processing and interpretation is about a year.
It's a good thought, but not anywhere near being a battlefield weapon yet. ;-)
How long to migrate the code to the Japan Earth Simulator (35 trillion floating point ops /second) or some of our bigger stuff at Los Alamos / Livermore? ;-)
Cheers!