Aftershock pattern of B.C. earthquake in Haida Gwaii puts U.S. seismologists on alert

[Emily]

http://www.king5.com/home/BC-earthquake-causing-concern-washington-176346531.html

B.C. earthquake causing concern in Washington


by GLENN FARLEY / KING 5 News

Posted on October 29, 2012 at 5:44 PM

Updated Monday, Oct 29 at 6:00 PM


SEATTLE ? At the Seismology Lab at the University of Washington, there is concern that the 7.7 magnitude earthquake that occurred on the British Columbia coast over the weekend could affect Washington.

?Earthquakes trigger more earthquakes," said Washington State seismologist John Vidale, who has long studied how different fault zones in Southern California affect each other, and is looking at the potential for the same effects here.

?We need to watch the whole region with extra care,? said Vidale.

[snip]

Release the pressure in a major way along one fault, and it can then add to the pressure on another fault. As of early Monday afternoon, more than 130 aftershocks were recorded, including one more than 100 miles south of the quake?s epicenter, thought to be on the Cascadia Subduction zone.

The subduction zone threatens a much larger quake of approximately a magnitude 9 from the northern tip of Vancouver Island to Cape Mendicino California. The Haida Gwaii quake is not located along a subduction zone.

See video for more about that quake on the subduction zone.

 

[Emily]

Re: Aftershock pattern of B.C. earthquake in Haida Gwaii puts U.S. seismologists on alert

http://www.kgw.com/news/Test-links-BC-earthquake-to-Oregon-coast-fault-176429471.html

Test links Canada quake to Oregon Coast fault
by Keely Chalmers

Posted on October 30, 2012 at 8:44 AM
Updated Tuesday, Oct 30 at 12:52 PM

CORVALLIS, Ore. -- Researchers at Oregon State University have discovered a link between last weekend's earthquake in British Columbia and a fault line off the Oregon Coast...