Ring of Fire world's 25 largest volcanic eruptions of the last 11,700 years occurred at volcanoes in the Ring of Fire. The famous and very active San Andreas Fault zone of California is a transform fault which offsets a portion of the East Pacific Rise under the southwestern United States and Mexico; the motion of the fault generates numerous small earthquakes, at multiple times a day, most of which are too small to be felt. The active Queen Charlotte Fault on the west coast of the Haida Gwaii, British Columbia, has generated three large earthquakes during the 20th century: a magnitude 7 event
Ring of Fire (Northern Ontario) of about "1.5 million hectares". Although the Ring of Fire crescent covers 5,000 square kilometres (approximately 1,930 square miles), most discoveries made by 2012 were within a twenty-kilometre-long strip. Ontario's Minister of Northern Development, Mines and Forestry Michael Gravelle called the region "home to one of the most promising mineral development opportunities in Ontario in more than a century". Tony Clement, Canada's Treasury Board President and the FedNor minister responsible for the Ring of Fire, claimed it will be the economic equivalent of the Athabasca oil sands, with a potential of generating $120 billion. Clement says the Ring of Fire