Sept 18 (LNGJ) - US Natural gas prices declined in most market locations across the country over the past week. The Henry Hub spot price began the week at $2.73 per million British thermal units and ended at $2.68 per MMBtu through September 18. Marcellus shale-gas prices are about $1.50 per MMBtu below the Henry Hub, the US Energy Information Administration said in its weekly report. At Tennessee's Zone 4 Marcellus location, prices increased from $1.14 per MMBtu during the week to $1.24 per MMBtu. On the Transco Leidy Line, Marcellus shale-gas prices increased from $1.20 per MMBtu to $1.28 per MMBtu.








