Had someone ask about a NG Generator a while back, as they remembered being without power after our last big quake, for several weeks!
My reply was... Diesel! The first thing you're going to do after a big quake is shut off the gas, if it doesn't shut off itself via the "quake valves" that are being installed now. If the quake was big enough to knock out the electric, the little metal ball in your gas valve will definately drop.
If a legally required stand-by:
"701.11(3) Dual Fuel Supplies.
Prime movers shall not be solely dependent on a public utility gas system for their fuel supply or municipal water supply for their cooling systems. Means shall be provided for automatically transferring one fuel supply to another where dual fuel supplies are used."
