Just read the Wall Street Journal article, and this paragraph jumped out at me.
But the academic said he can't say with 100% certainty that the Zug Island furnaces, owned by United States Steel Corp. X +0.96% , are indeed behind the Windsor hum. And engineers from nearby London, Ontario's Western University, which also participated in the Canadian-funded analysis, said their research indicated the probable source of the hum was "well" south of Zug Island.
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