What is a magnetic storm?

Geomagnetic storms are caused by solar activity.

When a magnetic storm occurs, this global violent disturbance will last for more than ten hours to dozens of hours throughout the magnetosphere, and all geomagnetic elements will change dramatically. Among them, the geomagnetic horizontal component H has the largest change, and its disturbance amplitude is usually between tens of nanoteslas and hundreds of nanoteslas.

It can best represent the characteristics of the magnetic storm process (its change is most prominent in the middle and low latitudes), so most of the morphological and statistical characteristics of the magnetic storm are obtained according to the change of the H component in the middle and low latitudes. The development process of typical magnetic storms is also divided according to the change of H component, which can usually be divided into three stages: initial stage, main stage and recovery stage.

Active alert:

165438+20231On October 30th, the National Space Weather Monitoring and Early Warning Center of China Meteorological Bureau issued a magnetic storm warning. It is predicted that geomagnetic storms may occur in three days:165438+1October 30th, 65438+February 60th and 2nd, of which 65438+February 60th.

The forecast suggests that this solar eruption is likely to produce high-intensity and gorgeous aurora in 65438+February 1 day, and northern China, such as Heilongjiang and Xinjiang, will have the opportunity to see red or even green aurora.

On June 5438+February 1 day, 2023, according to the detection of the Space Weather Center of China Meteorological Bureau, geomagnetic storms may occur in China on June 5438+February 1 day and February 2, among which moderate geomagnetic storms or even geomagnetic storms may occur on June 5438+February 1 day. On February 2, 65438, according to the monitoring and forecast of the National Space Weather Monitoring and Early Warning Center, a small to moderate geomagnetic storm may occur on February 4, 65438 due to the combined influence of the solar wind and CME of Sun East Expressway on February 4, 2008.

Baidu encyclopedia-magnetic storm