.USGS scientists recently completed a series of data publications mapping the submarine Queen Charlotte-Fairweather Fault off the coast of Canada & Alaska to better understand the fault's earthquake, tsunami, & underwater-landslide hazards.
The Queen Charlotte-Fairweather Fault extends more than 1,200 kilometers from offshore of Vancouver Island, Canada, to the Fairweather Range of southeast Alaska. An active strike-slip boundary similar to California’s San Andreas fault, the Queen Charlotte Fault has produced five magnitude-7-and-higher earthquakes in the last 100 years and presents the greatest earthquake hazard to residents of southeast Alaska and western British Columbia.
Like the San Andreas fault, the Queen Charlotte-Fairweather Fault separates the Pacific tectonic plate from the North American plate. Both are right-lateral strike-slip faults , and both can generate large, dangerous earthquakes. “We can think of this fault system as the San Andreas of the north,” said USGS Research Geophysicist Danny Brothers, a lead author of the publications. “It appears to be the fastest moving continent-ocean strike-slip fault in the world.” Speedy faults like the Queen Charlotte can trigger earthquakes and tsunamis more frequently than slower faults.. Since then, three different research vessels have collected more than 16,000 square kilometers of new high-resolution multibeam sonar on both the U.
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