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China issues “geomagnetic storm” warning, and these lights appear frequently in the north recently

After issuing geomagnetic storm warnings for three consecutive days on November 30, December 1 and 2, China’s National Space Weather Monitoring and Warning Center reported that geomagnetic activity still continued, and another on December 4. Small to severe storms may occur. , Moderate geomagnetic storm.

Affected by geomagnetic storm, Heilongjiang, Inner Mongolia, ChinaXinjiangAurora activities have also occurred in other locations, and even in Beijing, people have recently seen auroras at night.

China’s National Space Weather Monitoring and Warning Center reported that from 17:00 on December 1 to 8:00 on December 2, Beijing time, affected by the outbreak of solar coronal mass ejection (CME), a geo- with 3 Magnetic storms Earth was hit by moderate geomagnetic storms with an intensity of 7 hours and small geomagnetic storms with an intensity of 9 hours. Geomagnetic activity still continues.

The “KP Index” is the global magnetic field index, which measures the Earth’s magnetic field activity every three hours. The larger the value, the stronger the geomagnetic activity.

As a typical solar eruption, CMEs are driven by the sunspot’s strong magnetic field, which ejects hundreds of millions or even trillions of coronal particles at high speeds of hundreds to thousands of kilometers per second, creating an explosion-like event. A shock wave is formed. The shock wave rapidly spreads throughout the solar system. After being bombarded by it, there will be significant changes in the direction and shape of the Earth’s magnetic field and geomagnetic storms will occur.

China CCTV News reported that in addition to auroras, magnetic storms also have many other effects. One of them is to speed up the movement of particles in the Earth’s upper atmosphere, which eventually causes the entire atmosphere to expand. The heat spreads to higher altitudes, affecting the flight path.spaceSpacecraft cause greater flight resistance. This creates a vicious cycle of slower flight speed – less altitude – more resistance – and more deceleration – increasingly lower altitude, threatening the safety of the spacecraft in orbit.

According to the report, this is the seventh time after February 27, March 23 and 24, April 23 and 24 and September 19 this year that geomagnetic activity has occurred at the level of geomagnetic storm. According to the latest monitoring and forecast, a small to moderate geomagnetic storm may occur on December 4 due to the combined effect of high-speed solar wind from the solar coronal hole and CME on December 1.

Zhu Jin, a researcher at the Beijing Planetarium, also said that the impact of geomagnetic storms on the human body is very small and can be ignored, but it will have an impact on short-wave communications, etc., but it will not last too long. .

In addition, geomagnetic storms may have an impact on the space station. Atmospheric drag caused by the space station may cause orbital altitude to decrease, and satellite navigation instrument errors may also increase. Aviation flights would also face the dual risks of deteriorating atmospheric conditions and transpolar radiation. Therefore, early prediction can prevent risks.

China(tagstotranslate)space

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