An explosion happened off the coast of Florida, they're not saying what it was, just that "The recorded ground motions from this event are more typical of an explosion than a naturally occurring earthquake" per usgs and that it caused a 3.9 magnitude earthquake. So tell me if I'm crazy, but a while back there was that 4chan whistle-blower that talked about a USO off the coast in that area. I imagine that may not be the best spot to test military stuff just because it's close to populated area...

PAPOOSE LAKE, NV | USGS Store Pretty odd this topo map, which was created using aerial images taken in 1968, was edited on the exact day Bob Lazar went public. A preponderance of evidence indicates they had the whole cover story waiting in the wings, once the story dropped (the trigger), it went into motion. Check out the stamp in the bottom right-hand corner vs. the text in the lower left legend/source area. You can download your own copy for free from a .gov server.