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Tiny tremors push Vancouver Island away from B.C. mainland

Harry Leferts

Harry Leferts

Suave Shadow Cabal Kaiju
Long story short, it's another sign that strain is building in the Cascadia Fault. Which is very, very bad for when it ruptures, most likely during one of these very events:
A series of small tremors over the last few weeks have pushed Vancouver Island away from the B.C. mainland, according to a federal scientist.

John Cassidy, a seismologist with Natural Resources Canada, said the shift is known as an episodic tremor, and it happens every 14 or 15 months.

"Over the past few weeks the southern half of Vancouver Island has actually moved about four or five millimetres to the west towards Japan. It's something that happens around the world in similar tectonic settings," Cassidy told CBC.
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*Considers buying more canned goods*

Everyone should have a flat of tomato soup in the back of a cupboard that you forget you own

> : V
 
Conceded, though one of the issues is that statistically, we've BEEN due for a big quake for awhile now. And the longer it delays, the worse it'll be....
 
Shanejayell said:
Conceded, though one of the issues is that statistically, we've BEEN due for a big quake for awhile now. And the longer it delays, the worse it'll be....
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From what I can tell, the best measurements for time between earthquakes on the Cascadia Subduction Zone is 400-600 years, but with margins of errors on the order of hundreds of years. (Source: "Summary of Coastal Geologic Evidence for Past Great Earthquakes at the Cascadia Subduction Zone". Earthquake Spectra.)

I'm not convinced that a longer time between megathrust quakes correlates with higher magnitude quakes, but I also can't prove it wrong. There isn't much of the Juan de Fuca Plate left, but I don't know if that actually impacts quake magnitude.
 
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