A solar flare is an intensely solar activity phenomenon that is usually accompanied by a large amount of energy release and intense electromagnetic radiation. The level of a solar flare is usually divided according to its intensity and area of impact.
One of the commonly used classification methods is to divide them according to the number and area of sunspots. For example, according to this criterion, solar flares can be classified into five levels: A, B, C, M, and X, each of which is further divided into 10 subclasses (e.g., C1, C2, C3, etc.). Class A flares have the lowest intensity, and Class X flares have the highest intensity.
Another way to classify is to divide based on the energy released from solar flares. For example, according to this criterion, solar flares can be classified into five levels: A, B, C, M, and X, each of which is divided into several subgrades. Class A flares have the lowest energy release, and X-class flares have the highest energy release.
Regardless of the classification method, the level of a solar flare is an important indicator of its intensity and extent of impact. The higher the level, the greater the intensity of the solar flare and the more pronounced the impact on the Earth. For example, a strong solar flare may have an impact on the Earth's power system, communication systems, etc., and may even pose a threat to astronauts and spacecraft. Therefore, knowing the level of a solar flare is very important for ** and coping with solar activity.