About: http://webisa.webdatacommons.org/175444048

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Jim KSeptember 3, 2008, 01:28 PMIt is a shock wave, the same thing as a "sonic boom caused by a jet aircraft.
http://www.w3.org/ns/prov#wasQuotedFrom	thehighroad.org