J. connor, Content Marketing executive, MA, Minsk,Poland
Answered on Feb 08, 2019
Yes, this is a curious feature about the Hudson Bay area of Canada. There is a degree less gravity, as was discovered in the 1960s when scientists were charting the Earth's global gravity fields. They discovered found a weakness, although slight.
This would amount to something like a tenth of an ounce for someone weighing 150-pound. There are two explanations for this phenomenon: convection in the Earth's mantle, and the melting of the Laurentide Ice Sheet.