Keywords: Henry hub NG prices.svg en Y-axis Dollars per MMBTU 1 MMBTU of natural gas equals approx 28¼ cubic meter according to en British thermal unit X-axis year Previously Data from the New Mexico Institute of Mining and Technology Prices are nominal not adjusted for inflation http //octane nmt edu/gotech/Marketplace/Prices aspx Updated Image data now from the EIA site as they are now very comprehensive Exactly how they define the monthly price is unclear but the excel sheet seems to show the 2nd or 3rd week contract expiration but that might be wrong http //www eia gov/dnav/ng/hist/rngwhhdD htm Image created with Gnumeric 1 10 14 own Theanphibian 2009-06-04 Natural gas statistics |