Can the naked eye see the aurora?

On the night of June 5438+February 1 2023, a geomagnetic storm occurred in China, and the gorgeous aurora was visible to the naked eye in Heilongjiang, Beijing and other places, stunning the night sky. Aurora is a charged particle from the solar wind, which enters the earth's atmosphere under the guidance of the earth's magnetic field.

A natural phenomenon caused by the collision of atoms and molecules in the atmosphere. The conditions of aurora production include atmosphere, magnetic field and high-energy charged particles, all of which are indispensable. Solar wind is a kind of energy that the sun constantly radiates to the universe, which is mainly composed of electrons and protons. Due to the intense activity of the sun, countless charged particles will be emitted.

These charged particles move along the magnetic field lines in space. When these charged particles flow to the earth and enter the earth's magnetic field, they will enter the upper atmosphere near the north and south magnetic poles at high speed along the earth's magnetic field lines.

When these charged particles enter the polar upper atmosphere, they will collide with atoms and molecules in the atmosphere and be excited. According to scientists' understanding, this collision will produce "electromagnetic storm" and "visible light", forming the spectacular "aurora" we see.

The best place to watch the aurora:

1, Reykjavik (Iceland)

In fact, Iceland is in the aurora belt all over the country, so the aurora can be seen all over the country. Reykjavik is the capital of Iceland, with a population of about 6.5438+0.2 million, and its urban functions are developed. Iceland has various landforms, such as volcanoes, hot springs, waterfalls, glaciers and fountains. It can be said that it is a combination of beautiful scenery and scenery. In addition to chasing the aurora, there are various activities, which will never be boring.

Iceland has become the hottest aurora city in the world in recent years, but the only fly in the ointment is that the weather in Iceland is not very stable, and many people can't see the aurora because of the weather.

2. Tromso (Norway)

To the north of the Arctic Circle, it is the northernmost of all aurora cities, which means that winter nights are longer than others. It can also be said that winter is almost an eternal night, which makes it possible to see more aurora in a day. Tromso is a modern city with a population of 75,000, so the city itself is rich in functions, restaurants and bars, and there are many places to go.

Every year, from the end of/kloc-0 to the beginning of February, the Aurora Festival will be held here for 1 0 days, with many music and artistic performances. Because of the adjustment of ocean currents, the climate here will not be too cold, and there are many glacial fjords around, which can be said to be one of the most suitable aurora cities for tourism.

Above content reference: Baidu Encyclopedia-Aurora