How is the Northern Lights formed?

Aurora is due to charged particles from the sun entering the earth's magnetic field, gathering at high altitude near the north and south poles of the earth, and there will be brilliant and beautiful glow at night.

Aurora often appears in the sky near the earth's magnetic pole in latitude, generally in the form of strips, arcs, curtains and radiations, and these shapes are sometimes stable and sometimes constantly changing. Aurora has three conditions: atmosphere, magnetic field and high-energy charged particles.

Characteristics of northern lights

1, diversity

Aurora shows the characteristics of diversity and is regarded as one of the most beautiful wonders in nature. It is colorful, different in shape and beautiful. This is because the high-altitude gas is composed of many elements, and the colors of light emitted by gas bombardment of different elements are different, so the aurora appears colorful and varied. Sometimes it appears in a very short time, just like the fireworks of the festival flashed in the air and disappeared without a trace; Sometimes it can exist in the air for hours.

2. Time of appearance

Aurora is most likely to appear before the vernal equinox and autumnal equinox, and it appears more frequently in spring and autumn than in Xia Dong. In addition, when there are more sunspots, or the solar cycle is in the stage of increasing coronal mass ejection and increasing solar wind intensity, the frequency and brightness of aurora will also increase.