What happens when the earth’s magnetic field flips?

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What happens when the earth’s magnetic field flips?A paper published in the journal “Science” showed that the Earth’s most recent geomagnetic deflection occurred between 41,000 and 42,000 years ago. At that time, the strength of the Earth’s magnetic field was reduced to 6% of its current level, and the entire Earth was exposed to the erosion of solar wind and cosmic rays. under;

What happens when the earth's magnetic field flips?

What happens when the earth’s magnetic field flips?

It led to a series of severe climate disasters, and triggered the decline and extinction of some species at that time, and also changed the behavior of our Homo sapiens.

And scientists emphasized that the earth’s magnetic field reversal may happen again in the future, and it is very close to us.

The decline and extinction of species

 

What happens when the earth's magnetic field flips?

 

About 40,000 years ago, there were not only Homo sapiens, but also Neanderthals that we are familiar with all over the Eurasian continent. They were stronger and stronger in size, but shorter in height.

Neanderthals had lived in Eurasia for 200,000 years before Homo sapiens left Africa 100,000 years ago. They have fully adapted to the local environment and are excellent jungle hunters.

Regarding the decline of Neanderthals and their subsequent demise, biologists have given some speculations. Most of the speculations point to the expansion of Homo sapiens, and competition with Neanderthals for space and food has led to The extinction of the Nepalese.

What happens when the earth's magnetic field flips?

 

There are even biologists who believe that the extinction of the Nigerians was entirely due to the fact that Homo sapiens fought big and small wars with them in the past 100,000 years, and they were finally killed by Homo sapiens.

But these explanations are not enough to explain why the Nigerians who first reached Eurasia lost to the late Homo sapiens? Recent studies have attributed the decline of the Nepalese to environmental changes.

42,000 years ago, the earth’s magnetic field weakened and the earth lost its protective layer. A large number of charged particles bombarded the atmosphere and destroyed the ozone layer, resulting in increased ultraviolet radiation. At that time, the aurora could be seen not only at the north and south poles, but at night anywhere on the earth. Brilliant light show.

 

(What happens when the earth’s magnetic field flips?)

What happens when the earth's magnetic field flips?

The ionized atmosphere often has thunderstorms, and the whole earth looks like the end of the day. Under such a high-radiation environment, the life on the earth is miserable. At that time, not only the Nigerians declined, but many large organisms living in Australia All have gone extinct.

The decline of the Nepalese gave Homo sapiens an opportunity until they defeated them.

Homo sapiens can be spared from the influence of radiation because we Homo sapiens found a way to avoid radiation. About 42,000 years ago, a large number of cave art red ocher handprints appeared concentratedly. Scientists believe that the cave has become a shelter for Homo sapiens. There is also the earliest “sunscreen” of mankind.

 

What happens when the earth's magnetic field flips?

The red handprint in the picture above was found in a cave in Spain, dating back to about 42 million years. Such cave paintings appear very frequently in various places, and their ages are consistent with the time of geomagnetic deflection.

Homo sapiens not only had caves at the time, they also applied red ocher to their bodies to prevent radiation. This habit of applying red ocher to their bodies can now be seen in many indigenous groups in Africa, such as those in Namibia. There is such a habit.

The climate change brought about by the deflection of the magnetic poles seems to explain a series of extinctions that occurred on the earth 42,000 years ago.

How do scientists know that the magnetic poles deflected 42,000 years ago? How do you link magnetic pole deflection with climate change?

 

(What happens when the earth’s magnetic field flips?)

What happens when the earth's magnetic field flips?

The occurrence of magnetic pole deflection will leave traces in the bottom of the geology. We know that charged or magnetic particles will be deflected under the action of a magnetic field, and charged or magnetic particles will appear in the lava erupted by the volcano.

These magnetic particles are like a compass that can tell scientists where the geomagnetic north pole is at that time and leave signs of deflection in the lava.

So through the above findings, scientists can know at which period in the history of the earth the magnetic field deflection occurred.

But before this research, scientists have not linked the magnetic pole deflection 42,000 years ago to climate change, because there has been no evidence of climate change caused by the magnetic pole deflection.

 

What happens when the earth's magnetic field flips?

This time, scientists discovered a Kauri tree that has been preserved for more than 40,000 years in the sediments of New Zealand. The tree is very intact and even the bark is intact.

Scientists discovered a dramatic change in the level of radiocarbon 14 in this 2.5-meter-diameter kauri. Because the growth rings of the trees can tell us the exact time period, scientists found that the level of carbon 14 in the atmosphere was 42,000 years ago to 42,000. Years ago it was very high.

This time coincides with the time when the magnetic poles deflection, the decay and extinction of global creatures, and the red handprints left by humans in caves.

 

What happens when the earth's magnetic field flips?

Therefore, scientists have linked all the above events together, believing that changes in magnetic fields have triggered climate disasters, which in turn triggered the extinction of organisms, and had a certain impact on human evolution and behavior.

So how is the earth’s magnetic field generated? Why is there elegance? When will the next reversal come?

The earth is like a constantly rotating generator. It can generate a magnetic field thanks to the rotation of the earth and the molten iron shell in the core.

The temperature there is as high as 6000 degrees Celsius and the temperature on the surface of the sun is comparable. Such a high temperature causes a large number of atoms to be ionized, forming freely positively charged nuclei and negatively charged electrons.

 

(What happens when the earth’s magnetic field flips?)

What happens when the earth's magnetic field flips?

 

Because the nucleus is heavier, it will sink to the core, and the lighter electrons will rise to the mantle, so a layer of charged particles is formed in the molten core.

The Coriolis force caused by the rotation of the earth’s core will cause the charged particles in the core to deflect and move, and the moving charged particles will generate an electric current, which in turn generates a huge magnetic field throughout the world.

It stands to reason that the magnetic poles of the earth should be as fixed as the geographic north and south poles, without drifting. But the earth is very huge, coupled with the influence of the moon and the sun in the universe on the earth’s tidal gravity, it will cause the earth’s crust, mantle, and core to rotate, which are not completely synchronized, and small dislocations will always occur. .

 

Therefore, the north and south poles of the geomagnetism will float on the surface of the crust.

Since we humans have not a thorough understanding of the earth itself, and even the mechanism that generates the magnetic field is a theoretical guess, we cannot predict the law and period of the deflection of the magnetic field.

But what is certain is that the deflection of the earth’s magnetic poles will be accompanied by a decrease in the strength of the magnetic field, and we can also measure the speed at which the magnetic poles deviate from the geographic north and south poles.

 

What happens when the earth's magnetic field flips?

This is why the direction pointed by the compass is not the geographic north pole in the strict sense, because the earth’s magnetic north pole has been drifting northwest of the geographic north pole. From the measurement in the 19th century to today, the speed of drift is accelerating.

And scientists also found that in the past 170 years, the earth’s magnetic field has weakened by about 9%, so the earth’s magnetic poles are slowly deflecting, and the magnetic field strength will be further weakened in the future.

Therefore, the researchers warned that the next catastrophic polar flip “may happen soon.” This time period may be thousands of years, or tens of thousands of years.

 

(What happens when the earth’s magnetic field flips?)

 

When facing the reduction and deflection of the magnetic field, modern humans suffer more harm than the ancients, because our global power grids, satellite communications, and electronic equipment have been integrated into our lives;

If the strength of the magnetic field is further reduced, even to the current 6%, a weak eruption of the sun will paralyze human life.

Think about the days when there is no electricity and no internet, you can’t just go out and put on sunscreen.


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