Queen Charlotte Fault
Active transform fault in Canada and Alaska / From Wikipedia, the free encyclopedia
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The Queen Charlotte Fault is an active transform fault that marks the boundary of the North American plate and the Pacific plate.[1][2] It is Canada's right-lateral strike-slip equivalent to the San Andreas Fault to the south in California.[3] The Queen Charlotte Fault forms a triple junction south with the Cascadia subduction zone and the Explorer Ridge (the Queen Charlotte Triple Junction). The Queen Charlotte Fault (QCF) forms a transpressional plate boundary, and is as active as other major transform fault systems (i.e. San Andreas, Alpine) in terms of slip rates and seismogenic potential.[4] It sustains the highest known deformation rates among continental or continent-ocean transform systems globally, accommodating greater than 50mm/yr dextral offset.[5] The entire approximately 900 km offshore length has ruptured in seven greater than magnitude 7 events during the last century, making the cumulative historical seismic moment release higher than any other modern transform plate boundary system.[6]
The fault is named for the Queen Charlotte Islands (now Haida Gwaii) which lie just north of the triple junction. The Queen Charlotte Fault continues northward along the Alaskan coast where it is called the Fairweather Fault.[7] The two segments are collectively called the Queen Charlotte-Fairweather Fault System.