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The solar burst of 2006 December 06 reached a radio flux density of more than1 million solar flux units (1 sfu = $10^{-22}$ W/m$^2$/Hz), as much as 10 timesthe previous record, and caused widespread loss of satellite tracking by GPSreceivers. The event was well observed by NJITs Owens Valley Solar Array(OVSA). This work concentrates on an accurate determination of the flux density(made difficult due to the receiver systems being driving into non-linearity),and discuss the physical conditions on the Sun that gave rise to this unusualevent. At least two other radio outbursts occurred in the same region (on 2006December 13 and 14) that had significant, but smaller effects on GPS. Wediscuss the differences among these three events, and consider the implicationsof these events for the upcoming solar cycle.

Cause and Extent of the Extreme Radio Flux Density Reached by the Solar Flare of 2006 December 06