What is the phenomenon of magnetic storm?

When the surface of the sun is active, especially during the maximum sunspot activity, the number of flash flame bursts on the surface of the sun will also increase, and X-rays, ultraviolet rays, visible light, high-energy protons and electron beams will be emitted when the flash flame bursts. The current formed by charged particles (protons and electrons) impacts the earth's magnetic field, causing the so-called magnetic storm in short-wave communication. The so-called strong is relative to all kinds of geomagnetic disturbance. In fact, the variation of geomagnetic field on the ground is very small compared with its quiet value. In the middle and low latitudes, the variation of the surface geomagnetic field rarely exceeds several hundred nats (the quiet value of the surface geomagnetic field in most parts of the world exceeds 3 nats). Generally, magnetic storms can only be found by systematic observation with special instruments at geomagnetic stations. Magnetic storms are a common phenomenon. There are very few months without a magnetic storm. When solar activity increases, it may happen several times a month. Sometimes a magnetic storm occurs after 27 days (a solar rotation cycle), and then another magnetic storm occurs. This kind of magnetic storm is called repetitive magnetic storm [1]. The number of recurrences is usually once or twice.