OT: 1991 and 92 Mystery Booms.

Message posted by Paul on January 18, 2012 at 22:15:05 PST:

Found this about using seismic sensors to study sonic booms. A complicated subject for secondary booms that can travel hundreds of kilometers. It takes a look at a SR-71 flight, a Shuttle landing and the mysterious mystery booms over southern California.

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=35&ved=0CD4QFjAEOB4&url=http%3A%2F%2Fauthors.library.caltech.edu%2F3348%2F1%2FCATjasa02.pdf&ei=FoYXT4W7DcitiQLz9MzuDw&usg=AFQjCNFSfdWfDa_Zb9HN5YLme9U0hnBe2g

Attached link: Seismic detection of sonic booms

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