Scientists who mapped Earth’s global gravitational fields in the 1960s distinguish Hudson Bay from other regions. in a completely different color They marked it because there was very little gravity here. We can also say that if you slip in the Hudson, you are less likely to crash than in other parts of the world.

How can something so interesting be possible? Even though we’re not Neil deGrasse Tyson We will explain as much as possible.

First, let’s take a simple look at how gravity works.

In short, gravity is a force of attraction based on mass and distance. The more mass, the greater the force of gravity. As the distance increases, gravity decreases. In other words, the reason why we fall to the ground when we lose our balance is: The mass of the Earth is pulling us down.

In principle, the more mass beneath us, the greater the force of gravity, but the further away we are from something, the less gravity has an effect. So if we lose our balance somewhere far from Earth We do not retreat to the ground and fall We can say too.

According to the first theory, the reason for the low gravity in the region is related to “heat dissipation” or “transfer”.

The layer 100 km underground is a kind of “cover” of the Earth, and this “cover” is filled with hot magma. Magma is not stable, It’s constantly turning and turning. The reason why magma is moving is “heat convection”. Heat from the Earth’s core heats the magma and expands it, and as it expands it becomes lighter.

So it starts to float up and pushes the cooler magma down. Eventually this magma heats up and does the same thing. The same cycle repeats itself over and over again. This “heat convection” current, It could pull down the Earth’s tectonic plates. So when the plates pull down in areas like Hudson Bay, there is less mass underneath. As we said, this causes less gravity.

Another theory dates back to the Ice Age.

If we go back to the Ice Age, we would see that what is now Canada and the northern United States were covered in huge ice shelves. These very thick ice sheets are approx Melted 10,000 years ago and left a huge dent. The massive collapse pushed some of the ground sideways.

We can also say this: if you stand on the site of that well, you are closer to the Earth’s center of gravity and less mass It is possible. Although the closer we get to something, the stronger the force of gravity is, the loss of gravity due to the decrease in mass in this area is much greater than the gain of gravity from approaching the center of the Earth!

So which of these theories can we say is the most correct?

In fact, we can say that not just one of the theories, but both play a role in the low gravity in Hudson Bay. Geophysicists at the Harvard-Smithsonian Center for Astrophysics in the US even say that both factors half as effective He says it is.

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