The GSC website has this at an approximate depth of 1 km. In that area, it would be well above the target injection site. I have an inkling that this may be an "induced seismic event" but that the injected fluids may have released a fault shallower than the targeted strata.
If true, this may be one of the larger "induced seismic events" in Canada, similar in magnitude one in NE BC in Aug. 17, 2015. A 4.6 earthquake is usually not very impactful but people certainly notice them. The relatively shallow depth of the epicentre would make this even more noticeable. I'm sure that there will be a lot of scrutiny of this for some time.
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