Summary
Beginning in 2011, residents of Windsor, Ontario, and nearby communities reported an intermittent low-frequency hum and vibration that sometimes disturbed sleep and could be felt as much as heard. The phenomenon prompted years of complaints and scientific investigations, during which researchers recorded low-frequency signals but were unable to conclusively pinpoint their source. Industrial operations on nearby Zug Island became the leading suspect. In April 2020, U.S. Steel shut down its blast furnaces on the island — and reports of the Windsor Hum ceased, providing compelling evidence that the long-running mystery had finally been solved.
Additional Notes
Reports of the Windsor Hum became prominent in early 2011, particularly in southern Windsor and neighbouring LaSalle. Residents described a deep, intermittent rumbling or pulsating vibration, sometimes comparing it to an idling diesel engine. For some witnesses it was more a physical sensation than an audible sound, and the recurring disturbance became serious enough to attract government and scientific attention. Natural Resources Canada conducted seismic monitoring in 2011 and detected a dominant signal of approximately 35 Hz associated with reported Hum events. The results indicated that the disturbance was travelling through the air rather than through the ground and pointed toward the heavily industrialized Zug Island, across the Detroit River in Michigan, as a possible source area. In 2013, the Canadian government funded further investigations by the University of Windsor and Western University. The University of Windsor recorded and characterized the Hum and found its properties consistent with blast-furnace operations on Zug Island. However, the Hum failed to occur while specialized equipment was positioned to determine its exact source. Western University's measurements also detected low-frequency signals during some reported events but did not conclusively locate their origin. The mystery persisted until April 2020, when U.S. Steel shut down its blast-furnace operations on Zug Island. Reports of the Windsor Hum subsequently ceased. Colin Novak, who had led the University of Windsor investigation, later said that he considered the mystery 99 percent solved. Although researchers never obtained the direct source-location measurement they had sought, the disappearance of the Hum following the shutdown provided compelling circumstantial evidence that the Zug Island blast-furnace operations had been responsible.
The Location Today
Windsor and neighbouring LaSalle remain populated communities along the Detroit River, but the Hum that affected residents for nearly a decade is no longer reported. After U.S. Steel idled its blast-furnace operations on nearby Zug Island in April 2020, reports of the recurring low-frequency sound ceased. Zug Island remains an industrial area, although the suspected blast-furnace operations associated with the phenomenon are no longer active.
- Environment
- River, Urban Area, Industrial Area
- Time of Day
- Various, often noticeable during quiet periods
- Evidence Level
- Investigated Case
- Visiting the Location
- Not Applicable
- Ownership of the Location
- Not Applicable