What strange phenomena are there in life, such as mirage and aurora?

Rainbow after rain, flaming clouds, solar eclipse, lunar eclipse

2. 1 Northern Lights

Undoubtedly, the Northern Lights is one of the most beautiful scenery on earth. Since people discovered it, it has been deeply attracted by the mystery and beauty of this phenomenon. The Northern Lights usually occur when the sun releases high-energy charged particles, which are released from space at a speed of 300- 1200 km per second. The cloud structure formed by these charged particles is called plasma region. The plasma stream released by the sun is called the solar wind. When the solar wind touches the edge of the earth's magnetic field, some charged particles are captured by the earth's magnetic field and enter the earth's ionosphere along the magnetic field lines. The ionosphere extends 60-600 kilometers into the air. When charged particles collide with the gas in the ionosphere, they begin to glow, producing magnificent scenery. This wonderful aurora phenomenon also appears in the Antarctic region.

2.2 *** Cloud

* * * Cloud, also known as * * * Cumulus Cloud, is composed of numerous baggy and drooping cloud-like structures at the bottom of the cloud. It is mainly made of ice and can extend for hundreds of miles in any direction. But some * * * cloud structures can remain static 10- 15 minutes. Whenever a cloud appears, it indicates the arrival of bad weather.

2.3 Red tide

Red tide refers to the rapid accumulation of algae in estuaries, oceans or fresh water areas, thus covering the whole sea area or beach and turning seawater into blood red. This phenomenon is due to the dense visible mass structure formed by the accumulation of high-density phytoplankton on the water surface. Although some phytoplankton are harmless, a few phytoplankton are highly toxic, which can cause the death of fish, birds and marine mammals. In some cases, even human beings will be harmed by red tide, although no one has been recorded to have died of it.

2.4 melting icicles

Melting icicles look very much like ice spears and mainly exist in alpine glaciers. They vary in size-from a few centimeters high to 5 meters high. At first, the sun shines on the surface of snow or alpine glaciers and melts, forming irregular dents. Once such dimples are formed, the sun's rays will be reflected in the dimples, increasing the sublimation of local substances. With the gradual deepening of dimples, deep grooves will be formed, and finally a structure like a standing ice spear will be formed.

2.5 moving stones

In recent ten years, the moving stones in the mud Gobi of Death Valley in California have become the focus of controversy in the scientific community. Many scientists can't give a reasonable explanation for this strange natural phenomenon. Even a stone weighing several hundred kilograms will naturally move several hundred meters away. Some scientists speculate that this phenomenon may be due to the combined action of strong winds and surface ice. However, this theory cannot explain that rocks with different masses can move side by side at different speeds or in different directions. In addition, the above theory is not supported by physical calculation. It takes at least hundreds of miles per hour to move some stones, but in the end, such wind speed can't move hundreds of pounds of stones to hundreds of meters.

2.6 Super airflow column

Super airflow column is a natural phenomenon of deep rotating updraft that appears continuously in strong storms (such as cyclones with diameter less than 16 km). This natural phenomenon looks terrible. This phenomenon can last for several hours, and sometimes it may split into two halves, one on each side of the storm. When a superjet sweeps through an area, it usually brings hail, storms and sometimes tornadoes. Sometimes it will land some huge hail, and the following may happen.

2.7 fire tornado

Fire tornado, also known as fire devil or fire whirlwind, is a rare flame phenomenon under some special conditions. Usually, it is mainly affected by gas temperature and airflow, forming a vertical vortex or vertical radial rotating gas column similar to tornado effect. Generally, fire tornado occurs in a jungle flame, and forms a vertical vortex fire column under specific air flow and temperature conditions. Fire tornado can be 30-200 feet high and 65,438+00 feet in diameter, but only.

2.8 gravity wave cloud

Wavelike gravity wave clouds are usually generated when the updraft extends to mountainous areas or accompanied by thunderstorms. Wave-shaped gravity clouds will only be generated when the updraft enters the stable air mass. The upward airflow impulse produces a chain reaction in the cavitation, thus forming the change of clouds in the atmosphere, changing the dynamic curve of clouds and making them look like gravity waves.

2.9 hum

Buzzing noise refers to the persistent and diffuse low-frequency communication noise that human ears can't hear. It is reported that this strange noise phenomenon appears in different geographical environments. Some noise sources have been identified. For example, researchers found this noise in Taos, New Mexico, USA, so it was also named "Taos Buzzing Noise". Researchers point out that this strange noise exists all over the world, especially in Europe. The buzz on the island of Hawaii is closely related to volcanic activity, but the recorded noise is dozens of miles away from the volcanic area. Hum is usually described as sounding like a diesel engine idling, so it is difficult to detect and record it with a microphone. So far, scientists have not been able to accurately explain its causes and sources.

2. 10 cryosphere

This strange natural phenomenon usually only occurs in very cold countries or regions. Scientists generally believe that the ice ring is formed by the accumulation of ice on the water surface in the central area of the water surface, not at the edge. A slow-moving river can form a slowly rotating vortex, and when the water rotates, an ice ring is formed. The edge of the ice ring melts slowly until cracks appear on it, which will lead to the decline of the ice ring. The largest diameter of these ice rings can reach more than 500 feet.