Unexplained ‘Boom’ Near Town in Alberta Canada Tuesday Night Was Not Seismic: Earthquakes Canada
What was initially believed to have been an earthquake near Lac La Biche, Alta. Tuesday night was likely caused by something above ground.
Natural Resources Canada (NRC) posted on its website Wednesday that an earthquake was registered west northwest of Edmonton Tuesday.
The organization reported a 2.5-magnitude earthquake 97 kilometres from Edmonton at 9:36 p.m (UT).
However, on Friday, Earthquakes Canada sent out a message on Twitter saying the “acoustic disturbance” or “boom/small shake” near Lac La Biche on Jan. 24 was “likely from an above ground source.”
Earthquakes Canada also said “nothing seismic was recorded.”
Acoustic disturbance ref. to boom/small shake near Lac La Hache, N Alberta on night of 24th/25th – likely from above ground source.
— Earthquakes Canada (@CANADAquakes) January 27, 2017
Several Lac La Biche residents reported to Global News that their homes shook and they also heard a very large boom. Lac La Biche is about 215 kilometres northeast of Edmonton, which is east of where the NRC report said the quake was centred.
The cause of the boom is unknown.
Previous earthquakes in northern Alberta have been blamed on hydraulic fracturing, or fracking.
Fracking involves injecting a chemical mixture into the ground. The pressure of the fluids then breaks shale formations and releases oil or natural gas for capture.
On Jan. 12, 2016, the Alberta Energy Regulator confirmed a 4.8-magnitude earthquake happened near Fox Creek, Alta.
Alberta averages 30 earthquakes a year and there are over 4,000 earthquakes annually in Canada, but about 50 of those are felt, according to the Geological Survey of Canada.
(With files from Emily Mertz)