Countries around the world have different views on this exchange of the earth's magnetic field.
Scientifically predict the earth's magnetic pole reversal in 20 12 years.
Sina science and technology news April 8 news, the earth's magnetic field reversal is a rare phenomenon, but once it happens, it will have a disastrous impact on mankind. However, scientists have been arguing about how long it takes for the earth to complete a magnetic field reversal. A study published today pointed out that it takes about 7000 years for the earth's magnetic field to reverse once, and the previous events led to the Ice Age and the Great Flood respectively.
In the last 780,000 years, the phenomenon of irregular switching between the north and south magnetic poles has occurred at a long interval on the earth.
Most scientists believe that the geomagnetic field is produced by the rotation of liquid iron flow around the center of the core. When the flow of liquid iron in the earth changes, it may cause the flow direction to rotate 180 degrees, thus reversing the geomagnetic field.
The strength of the earth's magnetic field will continue to weaken until a new magnetic pole is produced.
However, scientists have been guessing how long it will take the earth to complete this rotation process, and the estimated time ranges from several thousand years to 280 thousand years.
American scientist Bradford Clemente is analyzing stratigraphic deposition samples collected from all over the world. These sedimentary samples belong to four different geographical and historical periods, and they retain the information of the earth's magnetic field at that time. Scientists at Florida International University said: Through the analysis of these samples, we can know that it takes about 700 years for the earth's magnetic field to reverse once.
But the reversal of the earth's magnetic field is not completed at the same time. This process is faster in the equatorial region, but it takes longer in high latitudes near the polar regions. Clement explained that this is because in the absence of the north-south magnetic field, the earth's core produces a weak magnetic field, which makes many "pocket small magnetic poles" appear on the earth's surface.
Finally, two new magnetic poles were formed, but the north and south magnetic poles were reversed and the magnetic field strength recovered.
No one knows how the reversal of the earth's magnetic field will affect life on earth, but many people will think of the end of the world.
In the process of bipolar reversal, many aspects of life on earth today will be reversed and confused. By then, the earth's magnetic field that protects human beings from the strong radiation of high-energy particles from the sun will disappear completely, and the earth will be exposed to all kinds of deadly cosmic rays; But also will heat the upper atmosphere and cause global climate change; Damage to all navigation and communication satellites in low Earth orbit; In addition, it will make all the migrating animals on the earth lose their directional ability.
The Gospel-Hulot, a scientist of the Paris Geographical Society, found through observation that the earth's magnetic field almost completely disappeared near the earth's poles. Hulot said that this is an early signal that the earth's north and south poles are about to turn over.
Ronald Merrill, a scientist at the University of Washington, said that the earth's magnetic pole flip "seems to happen randomly". The shortest interval between two flips is between 20,000 and 30,000 years, and the longest may be 50 million years. (Compile/Dream Fly)
Experts from Seismological Bureau of China believe that geomagnetic inversion is harmless to human beings.
Source: July 23, 2004 10:08 Beijing Science and Technology News.
In the new geophysical sci-fi horror novel "The End of the Earth", the earth after geomagnetic reversal is described as follows: birds are disoriented and human beings live in frequent radiation warnings. In the movie of the same name, governments around the world jointly built a manned probe ship, which can pass through the solid rocks in the mantle layer with a thickness of 2,900 kilometers and can withstand the heat of the earth's core-the temperature here is almost comparable to that of the sun's surface. The mission of the probe ship is to detonate the nuclear bomb, so as to restore the natural flow of iron atoms in the center of the earth and counter the trend of geomagnetic field inversion. Are these just the fantasies of novelists and filmmakers?
On April 2 1, this newspaper published the article "Scientists are worried about the reversal of the North and South Poles", citing the research results of foreign experts, and proposing that if the North and South Poles are reversed, it will bring great disasters to life on earth. Recently, our reporter made a special trip to visit relevant experts from the Seismological Bureau of China, but they expressed completely different views.
Have you ever thought that homing pigeons that can fly thousands of kilometers to deliver letters accurately will lose their way one day? Have you ever thought that the compass that looks like a "natural" guide will turn around one day? The above assumptions are by no means alarmist. The recent discovery of geophysicists seems to be showing us such a picture. A recent article in the American magazine Science pointed out that the magnetic field generated by the earth's north and south poles has been decreasing rapidly in recent 150 years. If this speed continues, the geomagnetic field will disappear completely sometime in the next Millennium.
What does it mean if the earth's magnetic field really disappears? Its influence on the earth is not just that the compass can't guide it. Some foreign scientists have seriously pointed out that if the earth loses its geomagnetic umbrella, high-energy cosmic particles and solar particles will destroy satellites, and things closely related to human beings will be exposed to deadly cosmic radiation.
Fortunately, more experts believe that the geomagnetic field will not really disappear, and the attenuation of the geomagnetic field is only a transition in the reversal of the earth's north and south poles. Some experts pointed out that in the past 500 million years, the so-called geomagnetic polarity reversal has happened hundreds of times on the earth. You may ask: Why is there a magnetic field on the earth's surface, which is made up of land and sea? If the magnetic field reverses in the next Millennium, will there really be a catastrophe for mankind?
The earth's magnetic field comes from the movement of the outer core, and the formation of the earth's magnetosphere is influenced by the solar wind.
Zhan Zhijia, a researcher, is the deputy director of the Geomagnetism Teaching and Research Department of the Institute of Geophysics, Seismological Bureau of China, and an expert engaged in geomagnetism research for many years. He told reporters that the innermost layer of the earth's structure is the core, which can be divided into three layers: the outer core, the transition layer and the inland core. Among them, the outer core is about 2080 kilometers thick and the substance is almost liquid. It is the liquid outer core that produces the earth's magnetic field through a mechanism similar to a generator. At present, the deepest drilling depth in the world is only 16 km, and human beings don't know much about the specific situation inside the core. At present, the specific process of geomagnetic field generation in academic circles is still in the theoretical and hypothetical stage. Theoretically, 99% of the earth's magnetic field is generated in the core, and the generated magnetic field changes slowly with time. The attenuation of geomagnetism reflects the slow change of geomagnetism with time. In addition, less than 1% comes from the ionosphere in the outer layer of the earth. The magnetic axis of the earth does not coincide with the autobiographical axis, and the included angle between them is about 1 1 degree.
Researcher Zhan said: "At first, there was an ancient view that the earth's magnetic field has a distribution of magnetic lines similar to that of magnets, which was confirmed in the observation of near-earth space. The distribution of magnetic lines on both sides of the earth is relatively consistent, as if there is a big magnet in the center of the earth. "
"Later, after launching satellites to observe the sky, it was found that the geomagnetic field was limited to a certain range far away from the earth, forming the so-called magnetosphere. This is different from the situation that the earth's magnetic field lines spread to the whole space like magnets, which is mainly the result of the interaction between the solar wind and the earth's magnetic field. Due to the limitation of the solar wind, the top radius of the magnetosphere facing the sun is 7-9 times that of radius of the earth, and the magnetic tail has 40- 100 magnetosphere radius. "
Geomagnetic inversion has occurred many times in the history of the earth, but the attenuation trend is still uncertain.
What about the reversal of the earth's magnetic field? Researcher Zhan explained: The earth is like a big magnet. One N pole is the North Pole, and the other S pole is the South Pole, and vice versa. It turned out that the North Pole became the South Pole, and the South Pole became the North Pole. The time interval of this change is relatively long. There have been three reversals in the past 6 million years. The shortest interval is 700,000 years, and the longest is1.50,000 years. So the so-called inversion occurs on a long time scale, and the magnetic field attenuation is a phenomenon in the inversion process. However, there is indeed a decay process at present, and the geomagnetic field intensity in some areas has a downward trend.
Asked whether the magnetic field will disappear, researcher Zhan pointed out: "Today, the earth's magnetic field has always existed, and no era has completely disappeared. Historically, it decayed to a certain extent, and the geomagnetic field reversed. The earth's magnetic field has its own inevitable changing law and is also related to external conditions. In the past, some foreign scientists predicted that the magnetic field would reverse in the next millennium. From now on, there is no solid foundation that can be reversed in a thousand years. "
"According to the law of historical changes, the geomagnetic attenuation will be reversed to a certain extent, but it will take time to test whether the earth's magnetic field will continue to decay."
Researcher Zhan pointed out: During the hundred years from 1900 to 2000, the magnetic field of the earth's north and south poles has been decreasing. On the surface, the trend after 2000 seems predictable. However, the decline curve in the first hundred years is not a straight line, and there is not only one speed of decline, there are fast and slow. Naturally, it is also possible that the curve will rise slowly after three years and five years. Now computers can use some models to simulate the change of magnetic field. Some assumptions were established in the past, but whether they are established in the future remains to be studied. The conclusion in Science magazine is only based on historical experience and speculation after computer simulation research.
The geomagnetic field is a weak magnetic field, and the intensity change caused by inversion will not cause disastrous consequences.
How will the reversal of the earth's magnetic field affect human life and the surrounding environment? "The last geomagnetic reversal was millions of years ago, so there is no historical record. But from biomagnetism's analysis, living things are bound by the magnetic field in the magnetic field. Some experiments show that the strength of magnetic field has an influence on the behavior of some creatures. Some experts have done statistics, and changes in the earth's magnetic field have an impact on heart disease. In the process of geomagnetic field change, some patients will be a little fidgety. It is speculated that when the geomagnetic field is reversed, the dramatic changes in the geomagnetic field still have a certain impact on human beings. " Researcher Zhan explained this.
Researcher Zhan said: "biologists have found that homing pigeons that can fly accurately over a long distance rely on geomagnetism to identify their direction." If the geomagnetic field changes, it will definitely interfere with their flight path. "
He also stressed: "Even if the geomagnetic field is reversed, it will not have disastrous consequences, and there will be no phenomenon that human beings cannot survive. Now astronauts still live well outside the geomagnetic field. Although they have received special training, it shows the fact that human beings can survive without geomagnetic field after certain training. "
"We went to see the geomagnetic reversal in the geological age, which is a sudden process. Because geological age is often measured by hundreds of millions of years and tens of millions of years. For ordinary people who take minutes, hours, days and years as time units, this reversal is a gradual process. The compass guide can't appear one second ago, and it will immediately become a phenomenon pointing to the north the next. Our generation and even our grandchildren can't feel it. "
Will the intensity change after the geomagnetic field is reversed? Researcher Zhan told the reporter that the intensity of the geomagnetic field will change to some extent, but don't worry, because the whole geomagnetic field is a weak magnetic field, and now the average intensity of the surface magnetic field is only 1 gauss. Generally speaking, it is often only 0.5 -0.6 gauss. For example, the geomagnetic radiation in Beijing is only 0.55 gauss. The radiation next to an ordinary magnet is several or hundreds gauss, and the radiation next to an electron accelerator is several megagauss or even stronger. It doesn't feel so good when a magnet is placed beside us. Even if we are next to the accelerator with high radiation, there is no obvious feeling. Therefore, the change of geomagnetic field, a weak magnetic field, will not bring great influence to our lives.
The earth's magnetic field flips, and life is facing disaster? (The United States has a different view.)
According to The New York Times's report on July 13, in recent 150 years, the intensity of the earth's magnetic field has drastically decreased by 10%- 15%, which makes it easy for high-energy particles from the sun to penetrate the geomagnetic protective layer and "attack" some satellites. Even more frightening, according to the research of Dr. Gosl Hulot of the Geographical Society of Paris, this may be a precursor to the great reversal of the earth's magnetic field-the exchange of north and south poles.
The earth's magnetic field has been turned over many times.
Scientists have found that the earth's magnetic field has been turned over many times through the study of submarine lava. As we all know, fiery magma contains thousands of minerals, just like a "small compass". When the magma cools down, these "compasses" are also fixed and unchanged. In this way, the direction of its "north and south poles" recorded the direction of the earth's magnetic field at that time. Studies have shown that the earth's magnetic field flips every 500,000 years on average, and the last flip occurred 780,000 years ago. Because the magnetic field has been weakening for more than a hundred years, people can't help worrying about whether another "big face change" of the earth's magnetic field is coming soon.
Scientists point out that the iron fluid (melt) around the earth's core is like an "engine", which constantly converts huge mechanical energy into electromagnetic energy, thus forming the geomagnetic field. The molten iron sometimes forms a huge vortex, forcing its own flow direction to change, thus causing changes in the earth's magnetic field.
When the magnetic field turns, life on earth will face "extinction"?
Bipolar inversion of geomagnetic field is an extremely long process, which takes about 5000 to 7000 years to complete. Originally, this is not a terrible thing, but in this process, the earth's magnetic field that protects human beings from strong ultraviolet radiation will disappear completely, which will have extremely serious consequences.
First of all, many animals that migrate by recognizing the north and south poles of the earth will be "out of place". For tens of thousands of years, bees, pigeons, whales, salmon, red turtles, Zimbabwean moles and other animals have been relying on innate instinct to move from autumn to spring under the guidance of magnetic fields. Once the magnetic field disappears, their fate is hard to predict. For human beings, the most fatal blow is direct exposure to strong ultraviolet rays. At that time, various disasters such as skin cancer will come. Hollywood made a big fuss about this, and released a new film "The Earth's Core" in 2003, which described the tragic situation when the geomagnetic field disappeared: people with pacemakers fell to the ground and died; Pigeons fly around and hit pedestrians and windows; The whole earth was "barbecued" alive by solar radiation for a year.
Using satellites to monitor the changes of the earth's magnetic field
However, scientists warn people not to worry too much. Even if the geomagnetic field does turn over, it will be at least two thousand years later. A professor at the University of Rochester in the United States bet that they had gone to another world by then. However, researchers are still "preparing for a rainy day"-the European Space Agency plans to launch three satellites across the poles in 2009 to monitor the changes in the earth's magnetic field. Dr. Hulot said that this can not only help people predict the changes of the magnetic field, but also avoid "accidents" that may occur in the short term, for example, protecting those low-orbit satellites from the influence of solar particles.
Will the magnetic poles of the earth and the sun reverse at 20 12?
According to NASA, the sun may be abnormal in four years. Astrophysicists and computer scientists found that the last time the same phenomenon happened when dinosaurs disappeared. In modern human history, there is no on-site record of this phenomenon.
The process of magnetic field inversion between the North Pole and the South Pole is called magnetic pole inversion. The worst result of this phenomenon will make the magnetic force of the earth's magnetic field zero gauss (gauss is the unit of magnetic induction). If the solar magnetic field with a period of 1 1 year is reversed at this time, the immune system of all animals (including humans) on the earth will be greatly reduced. There will be more volcanic eruptions, earthquakes, mudslides and other phenomena in the earth's crust; The magnetosphere of the earth will weaken, and the cosmic radiation from the sun will increase, which may eventually cause radiation disaster to mankind; Some asteroids will fly to the earth; The gravity of the earth will also change. Finally, it is concluded that if all zero-magnetic conjectures occur at the same time, only creatures living deep in the earth's crust can be unaffected. At that time, the way humans avoided disasters was to hide under the earth's crust or move to other planets to live. Maybe Mars will be a suitable choice. However, NASA issued a statement saying that the magnetic force is zero, which is only the worst possibility and does not necessarily happen.
● El Nino 20 1 1 is a very special year, and there are four eclipses in ★ * *. Among them, the solar eclipses of 65438+1 October 4, 65438+June 0 and1October 25 occurred in the polar regions, and the solar eclipses of1day occurred in high latitudes, which was beneficial to induce El Nino ... According to the theory of solar eclipse-El Nino coefficient, the solar eclipse-El Nino coefficient in 20 1 1 year is 10.5, and that in 20 12 years is 13. Comparatively speaking, the solar eclipse-El Nino coefficient of 1997 is 12, but in that year, the strongest El Nino event occurred in the 20th century. Lin Zhenshan, a professor at Nanjing University, and others predict that an El Ni? o event will occur in 20 1 1 year.
The coincidence of nature makes the El Nino event and magnetic crisis threaten the life of the earth 2065438+02 * *● The earth transformation and spiritual exchange on the eve of Gefinda in 2004.
Our solar system enters a high-energy photonic band every 26,000 years.
When the earth approaches this photon belt, there will naturally be abnormal changes, social violence will emerge one after another, people will be flustered, impetuous and lose their sense of direction, and the whole world will be shrouded in an uneasy atmosphere. In fact, this is a very normal phenomenon.
The earth passed through this photonic band at 1987.3. 16 and left after 7 days. After that, it will take another two weeks 14 days a year to pass through this high energy zone. ▲ By 2012.12.21,the earth will completely enter this photonic band. Due to the influence of this huge energy field, some people have begun to feel their hearts beating. When they go to the hospital for examination, they can't find out the reason. In fact, they are suffering from a "fourth-dimensional disease". Because the earth is about to turn into a four-dimensional world.
If human beings can awaken their inner spiritual life and open the door to the spiritual world as soon as possible, then we will push the earth into the fourth world as soon as possible-a world of high spiritual civilization without violence, disease and competition, a world that lives in the present joy, and we can also see countless alien life and visit them.