Would it have been around this time? I'd be interested to know if their seismographs can be used to detect non-earthquake recordings.
When I was little I lived less than an hour from Cape Canaveral and damn, when those shuttle missions launched, you'd feel it in your bones. I'm not sure how it would feel if it were just in the air crossing my path though.
2nd link would be the closest but not, the right time.
there was definately acoustic energy, in the air, this wasnt ground tremor, it was distinctly different, and the volume followed the appearance, zenith, and dissapearance of the spiral.
it was not a snowquake either, and it wasnt from Clear, or Elmo.
it was not a snowquake either, and it wasnt from Clear, or Elmo.