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originally posted by: jhn7537
originally posted by: AlexanderM
a reply to: muzzy
They are reporting quakes off Vancouver Island and Seattle on the news this morning, both in the 4+ range.
It has my attention right now, seeing as I live in downtown Seattle... I hope this activity isn't building up to something large..
Slow Slip Earthquake season raises risks of The Big One
B.C. is headed back into another one of its riskier seismic seasons, raising the risk of "The Big One," earthquake experts say.
Every 14 months, the Cascadian subduction zone — which runs from northern Vancouver Island down to northern California — experiences what seismologists call a "slow slip."
This year's slip has already kicked off underneath Washington State and is expected to reach B.C. any day now.
The phenomenon happens when seismic stress shifts onto the fault area where the Juan de Fuca and North American plates lock together.
That causes thousands of mini-tremors and heightens the likelihood of a major earthquake event in B.C., according to seismologist Alison Bird.
"If that locked zone is close to critical, and you add more stress on to it ... that could trigger, theoretically, the 'megathrust' earthquake," said Bird, who works for the Geological Survey of Canada.
As for how much more risk that is, she says it's been likened to the increased risk of driving in rush hour traffic.
"Going for a drive in the country on a Sunday, you're not that likely to be in a car accident. But if it's rush hour in Vancouver and there's a game on ... you're more likely to be in an accident. You're not necessarily going to be, but the probabilities are higher."
P.S. I think you had some large quakes north of you.