Largest recorded Alberta earthquake not natural, from oilsands wastewater: study
The largest recorded earthquake in Alberta’s history was not a natural event, but most likely caused by disposal of oilsands wastewater, new research has concluded.
Residents reported being knocked to their knees. The earth was pushed upward by more than three centimetres — enough to register on satellites. Similarly, a look at previous research on so-called “induced seismicity” revealed long lag times between deep-well water injection and earthquakes. Statistical analysis of correlation between the quakes and the underground pumping was conclusive, Schultz said.
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