是这个吗？

http://www.eia.gov/naturalgas/weekly/

Prices at the Chicago Citygate were above Henry Hub, starting the report week at $2.94/MMBtu and closing yesterday at $2.98. A force majeure on Canada's Alliance Pipeline, which runs from western Canada to Chicago, had limited effect on Chicago prices because of the availability of alternate supplies. Natural gas containing poisonous hydrogen sulfide was mistakenly injected into the Alliance Pipeline, which resulted in the shut-in of all flows at the end of last week. The closure limited flows to the Vector Pipeline in the Great Lakes area, which reduced natural gas exports to eastern Canada from the United States through St. Clair by 0.5 Bcf/d, according to Bentek Energy. Price at the St. Clair Hub in Michigan, the pricing point for internationally traded gas between the United States and Canada, started the week last Wednesday at $2.99/MMBtu and closed at $3.06/MMBtu yesterday. Alliance retur