Natural Gas Spot Prices Now Below $2: Adjusted for Inflation, That's the Lowest Since the Mid-1970s
Update: EIA spot price data only go back to 1997, but another data source, Global Financial Data, has natural gas prices back to 1930, at least annually for all those years. Natural gas prices were pretty low between 1930 and the mid-1970s, with nominal prices ranging between $0.05 and $0.30 per million BTUs during that period. Adjusted for inflation, those prices were below $1 per million BTUs in some years, so today's prices haven't yet reached those lows. Thanks to Benjamin, who pointed this out in a comment below. I stand corrected.