Gravity changes more than the world is

2013/09/09 Etxebeste Aduriz, Egoitz - Elhuyar Zientzia Iturria: Elhuyar aldizkaria

• Geologia

Gravity is not the same everywhere in the world. This is not new, but according to the new gravity map drawn up by Australian and German researchers, gravity changes 40% more than previously thought around the world.

7 year data from the GRACE satellite, 2 years from the GOCE satellite, data from the US Geospatial Intelligence Agency. and topographic and batimetric data have been used to elaborate the new map. And a supercomputer that has worked for 80 years on a normal computer. Thus they have achieved the most accurate map of gravity so far: it gives a gravity of three billion points, a point of 200 meters. According to this map, the lowest gravity is found on the Andean mount Huascaran and the largest near the North Pole.