There is a report of a boom this morning in Ventura County. Numerous people reported hearing which caused buildings to shake. Officials have no clue what it was. Here is the link:
http://www.vcstar.com/news/2010/feb/25/officials-investigating-boom-in-ojai-area/
http://www.vcstar.com/news/2010/feb/25/officials-investigating-boom-in-ojai-area/