Barrie, J. V. and H. G. Greene. 2015. Active faulting in the northern Juan de Fuca Strait: implications for Victoria, British Columbia. Geological Survey of Canada, Current Research 2015-6, 10p. doi 10.4095/296564.
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The Devil’s Mountain Fault Zone extends east to west from Washington state to just south of Victoria in the northern Juan de Fuca Strait. Recently collected geophysical data were used to map this fault zone in detail, which show the main trace, and associated primary and secondary (conjugate) faults that occur within a 6 km wide deformation zone west of the Canada/U.S.A boundary. The fault zone has been active in the Holocene as seen in the offset and disrupted upper Quaternary strata, seafloor displacement, and deformation within sediment cores taken close to the axis of the faults. Based on the length and previously estimated slip rates of the fault zone in Washington state, it appears to have a potential of producing a strong earthquake adjacent to Victoria, perhaps as large as magnitude 7.0 or greater.