When Earth's gravitational field was mapped starting in the 1960s a large region of below-average gravity was detected in the Hudson Bay … This ice sheet was almost 2 miles (3.2 km) thick in most sections, and in two areas of Hudson Bay, it was 2.3 miles (3.7 km) thick. Source(s): https://shrink.im/baqeS. They exhibit classic “cuesta” features – sandy/gravel/rocky beaches on the offshore Bay side, sloping uphill eastwards, and then dropping abruptly down several hundred feet to below sea level on the easternmost sides facing the mainland. If you have studied physics then you will know that gravity is a result of mass. These anomalies are the differences between the theoretical value of gravity at the surface and the measured value. You would be even lighter most places near the Equator which is about 20 miles farther from the center of the Earth, and gravity is reduce a … It is well away from the poles and it is at Sea Level. The colours range from purple (low gravity), through blue, green (normal) and yellow to red (high). This particular glacier was so heavy that it squeezed down on the rocks of the earth and held it there. The Nastapoka arc is a distinctively arcuate segment of the coastline of the southeastern shore of Hudson Bay, Canada, that extends from the most northerly of the Hopewell Islands to Long Island near the junction with James Bay.It is a prominent, near-perfect circular arc, covering more than 160° of a 450-km-diameter circle. Since then, scientists have been trying to figure out what is causing this anomaly but, up until today, they don’t know the exact answer. K1A OY3 (Canada) (Received February 2, … the Hudson Bay gravitational anomaly is about -0.005%. Based off science stuff, this should Hudson Bay has less gravity as compared to the rest of the world. There is the actual bay or there is a town in Saskatchewan called Hudson Bay as well. Free shipping on orders over $99. Some parts of Canada and especially The Hudson Bay, have less gravity than the rest of the earth. This ice sheet was almost 2 miles (3.2 km) thick in most sections, and in two areas of Hudson Bay, it was 2.3 miles (3.7 km) thick. Using a new approach to analyzing planetary gravity fields, two geophysicists, Mark Simons at the California Institute of Technology and Bradford Hager at M.I.T., have shown that incomplete glacial rebound can account for a substantial portion of the Hudson Bay gravity anomaly. For more than 40 years experts were baffled by an “anti-gravity zone” surrounding the Hudson Bay are in Canada, with some conspiracy theorists even claiming the spot might be a … 0 0. Kamiya Jani gave up her full time media job to dare to live the life she always wanted. Free-air gravity anomaly map, showing the low-gravity anomaly in Hudson Bay, Canada, which is partly due to the last ice age. Anonymous. A new theory to account for the Hudson Bay area’s missing gravity concerns the Laurentide Ice Sheet, which covered much of present-day Canada and the northern United States. The reasons for the shortage have puzzled scientists for decades. 40 years is how long it took for scientists to figure out exactly why this territory has less gravity. In the in the 1960s when the Earth’s global gravity fields were being mapped and registered, experts noticed a gravity anomaly in the Hudson Bay region and surrounding areas. Well, then you’ll remember that the world once went through a phase where the entire planet was covered in ice. It was heavily militarised during the Cold War to watch for potential Soviet bombing raids coming over the North Pole. 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