What influence does the moon have on the earth?

The moon and the earth constitute the most basic unit of the celestial system-earth-moon system (celestial level: earth-moon system-solar system-Milky Way-generalized galaxy), which can be said to be inseparable from the earth and has an unusual relationship. Its influence on the earth is obvious, mainly in the following two aspects: ① The natural lighting on the earth at night, as we all know, mainly depends on the moon. Otherwise, the night on earth will be dark and unimaginable. (2) The gravity of the moon and the sun is different everywhere on the earth's surface, so the water bodies on the earth have corresponding obvious tidal phenomena (in ancient China, people called the fluctuation of seawater in the morning and the fluctuation of seawater in the evening as sunseekers, both of which are collectively referred to as tidal phenomena. The tidal phenomenon of periodic fluctuation of the sea surface is mainly caused by the different gravitational forces of the moon and the sun on the earth.

tide

Just like the attraction of the earth to the moon, the moon attracts the earth, which makes the earth slightly oval. This deformation has little effect on solid land, but it will cause tidal waves along the coastline. Tides in turn affect the speed of the earth's rotation and the distance from the moon.

When the earth's surface enters and exits the ocean expansion zone caused by the moon's gravity, there are tides on the ocean surface twice a day. The actual height of the tide depends on the position of the moon in its orbit and the local topography.

The cause of tide

On the earth, the closest sea water to the moon feels the most obvious lunar gravity; On the contrary, the water on the back of the earth is least attracted by the moon. When the moon revolves around the earth, it forms two tidal high tides and moves with the moon on the surface of the earth. The rotation of the earth causes the tides to be slightly earlier than the earth, rather than in a straight line with the earth.

High tide and low tide

At the full moon and the new moon, the sun, the earth and the moon are in a straight line. The gravity of the sun and the tidal force of the moon combine to produce the highest high tide and the lowest low tide, which is the spring tide. When the first quarter moon and the second quarter moon appear in the moon phase, a right angle is formed between the sun and the moon. The gravity of the sun partially offsets the tidal force of the moon, resulting in a small tide.

Tidal force of the Moon

Dr. Sheru Pearson, a scientist of NASA, pointed out that when the solar system was just formed, the moon was pulled by the earth as its satellite, and the moon had a great influence on the earth in the process of being pulled closer to the earth.

The moon has tidal force to the earth. Scientists have confirmed that the gravitational tide of the moon has the following functions:

(1) The tidal force of the moon can keep the inclination of the earth's rotation axis stable, thus making the earth's climate relatively stable. As we all know, the moon and the earth, as two different celestial bodies, have gravitational interaction with each other, and now the inclination of the earth's rotation axis changes within 5 degrees. However, if there is no moon, the inclination of the earth's rotation axis will change from 0 to 50 degrees in a period of millions of years, and the earth's climate will also change dramatically, which will eventually make the earth an environment where living things cannot survive.

(2) The tidal force of the moon will also overturn the atmosphere, forming a so-called "tidal wave". "Air tide" will affect the air pressure and weather. For example, the air pressure is often very low during the full moon. Related research also found that the most serious storm in the United States occurred after the new moon 1 ~ 3 days or 3 ~ 5 days after the full moon. Therefore, some people advocate that the moon phase should be considered when forecasting the weather.

(3) On a full moon night, the earth will get warmer. This was discovered by climatologists Robert Bahrain and Randall Sevigny of Arizona State University in the United States after analyzing the observation results of meteorological satellites. In the past 15 years, meteorological satellites accurately measured the subtle changes of the earth's surface temperature after the moon was irradiated, and found that the average temperature of the earth increased by 0.0 17 degrees Celsius during the full moon.

The moon disturbs the human body

The relationship between man and the moon is also very close. Psychiatrists point out that the human body is about 80% liquid, and the gravity of the moon can also act on the liquid in the human body like ocean tides, causing "biological high tide" and "biological low tide" of the human body. At the full moon, the biological tide is at its peak, and the moon has a strong influence on human behavior. At this time, the head-chest potential difference is relatively large, people are easily excited, emotionally unstable and prone to accidents. According to the statistics of Japan Fire Protection Association, the number of fires on full moon night is 25% ~ 30% more than usual. Weber wrote in the book "The Influence of the Moon": "1September, 970, when the tide was high, the number of murders and mental hospitals in Miami in the United States increased than usual." For example, young people like to fall in love on a moonlit night, while alcoholics and mental disorders often have seizures on a moonlit night. Morris, a professor at Illinois State University, even pointed out that human murder, poisoning, depression and heart disease are also related to the moon's profit and loss.

A doctor in the United States investigated more than 1000 patients on the operating table and found that the bleeding of patients was related to the operation of the next month. According to the survey data, 82% of patients have a bleeding crisis between the first quarter of the full moon 1/4 and the last quarter of the moon 1/4, and the patients who bleed at the full moon are the most dangerous. Therefore, many doctors avoid operating on patients during the full moon.

The American Medical Association collected the birth tables of 500,000 babies in 20 years, and found that most babies were born in the waning moon (the last quarter moon). Most parturients in the coastal areas of the Netherlands give birth at high tide. The secret is that the moon affects the contraction of the uterus.

Moon-induced earthquake

When the sun and the moon act on the gravity of the earth

Earthquakes are prone to occur at the maximum, which can be generally divided into structural earthquakes and volcanic earthquakes according to their causes. For most tectonic earthquakes, the occurrence of earthquakes mainly depends on whether the crustal rocks there are on the verge of rupture. On the new moon (the first day of the lunar calendar) and the lunar calendar (the fifteenth and sixteenth days of the lunar calendar), the sun, the moon and the earth are close to a straight line. At this time, the tidal forces of the sun and the moon are combined, and the tidal force to the earth is much larger than usual. This gravity not only causes tidal phenomena in seawater, but also causes changes similar to high tide and low tide in the crust, forming a "solid tide", which can trigger the impending rupture of the crust and induce earthquakes. American seismologists believe that when the gravity of the sun and moon on the earth is the greatest, earthquakes are often prone to occur. According to statistics, since the 20th century, there have been more than 7 earthquakes 13 times. It was found that the earthquake occurred twice in the expected time; The earthquake occurred twice from the new moon and the moon 1 day; Earthquakes occurred five times (* * * 9 times) from the new moon and Wang 1 ~ 2 days, accounting for 69.2% of the total statistics of 13 times. This is enough to show that the new moon, the moon and its two to four days before and after have great gravity and are prone to earthquakes. See the following table for statistical data: statistics of earthquakes induced by new moon and full moon.

Name: The earthquake with magnitude is 8.3 1 9061day away from the new moon and observation.

Looking at 9 days 2 Great Kanto Earthquake 8.2 1 September 9231Distance 5 days 3 Great Tangshan Earthquake in China.

7.81July 28th, 976+0 day from new york 4 Bucharest earthquake 7.51March 4th, 977.

Riwang 5 Tabas Earthquake 7.7 1978 September 16 Distance from Riwang 1 Day 6 erzurum 7.

119831June 13, 7 days in new york and 7 earthquakes in Kars province.

Mexico City earthquake 8. 1 1985 September 19, 4 days away from new york, Nazkan earthquake 8.

7.11988 65438+February 7, 3 days away from new york, 9, 7.11989 65438+10/7 days away from the San Francisco earthquake.

Look at 2 days, 10, earthquake in northern Japan, 7.8 1993, July, 12, 7 days away, 1 1, China Taiwan Province Strait Earthquake, 7.

.3/KOOC-0/September 994/KOOC-0/6 Four Days Away/KOOC-0/2 China Lijiang Earthquake 7.0/KOOC-0/February 3, 996 Wang/KOOC-0/3.

Knowledge points of the East Iranian earthquake 7. 1 1997 May 10 days away from new york.

First quarter moon and second quarter moon

The first quarter moon and the last quarter moon are similar in appearance, but the time, position and bright surface are different. In the western sky in the middle of the night before the first quarter moon appeared, their "faces" were facing west, that is, the western half was bright; The last quarter moon appears in the eastern sky after midnight, and their "faces" face the east, that is, the eastern half is bright. Because the date of the China lunar calendar is arranged according to the moon phases, the working people in ancient China sometimes rely on it to judge the date of the China lunar calendar and the approximate time of night.