You are still set for personal reply only, David. I�m CCing the list. I am not the worst here about veering off topic! And I didn�t bring up the shuttle first, and the subject line IS the topic� man made sounds of war. What�s your beef? Well, then, we can debate whether subsonics are sound or vibration then� when cracks appear in the earth and houses fall down, that must be pretty loud! :-) <L> On Mar 16, 2015, at 2:12 PM, DAVID BURNHAM <[log in to unmask]> wrote: > Here's the original question: > >> This brings up a question for the house -- what is the loudest naturally >> occuring sound as far as SPL's -- a massive earthquake, a massive >> hurricane or tornado, or the thunder after a big nearly >> lightening-to-ground strike (or perhaps the thunder overhead after a big >> cloud-to-cloud strike)? As far as human hearing goes, I'd think thunder >> would sound loudest, but I wonder if earthquake is most SPLs because of >> the subsonic waves? > > > > On Monday, March 16, 2015 2:14 PM, Lou Judson <[log in to unmask]> wrote: > > > Not according to the subject line! > > <L> > On Mar 16, 2015, at 10:13 AM, Dave Burnham <[log in to unmask]> wrote: > >> I don't think the space shuttle counts because the question was about natural sounds, not man made. >> >> db > >