It's interesting; in the title CBC seems certain about the link between the earthquakes and fracking. However throughout the body of the piece, the scientist they quote expresses uncertainty.
So why does CBC make that leap from a possibility into a certainty? Is it for activists to convince people who refuse to actually read the article that fracking is evil.
CBC does appear to have joined the anti-fracking, activist, brigade.
It's unfortunate CBC is afraid to give you an in depth interview with a scientist as to what exactly the connection is that they believe can be made between some earthquakes and some fracking operations.
Not to worry. There's always Glenn Beck.

Diss him as you will, but in this case he'll let you hear the stuff CBC doesn't want you to know about.
So basically frackquakes rare, require existing fault lines and only happen during certain times of the day.
Also he doesn't mention it, but the ones detected so far are more in the range of what you might feel alongside a highway if a large truck passed.