On September 22, 2009 Wildfire Today reported that the Ventura County Sheriff’s Department said the Guiberson fire near Moorpark, California started from “manure spontaneous combustion from a local ranch.” Now the Ventura County Fire Department has more or less confirmed that initial assessment, saying the fire, which burned 17,500 acres was caused by the spontaneous combustion of a mulch pile.
A map of the fire is HERE. And to remind you, this was the fire on which a lead plane and air tanker “rescued” some horses that were trapped on an extremely steep slope.