Why do flares themselves produce auroras? What substance in it makes him produce aurora?

I will. Flare is the strongest manifestation of solar activity, and solar storms will be more intense at this time. Particles ejected from the sun and flying to the earth will fly to the poles of the earth at high speed. It collided with the atmosphere above the poles, producing the aurora.

On September 29th, Beijing time, a sunspot with a diameter of 62,000 miles (about 65,438+million kilometers), which is equivalent to the earth's diameter 10 times, is producing a huge solar flare, which is a spectacular aurora show in the British night sky. A stargazer said it was the most beautiful aurora he had ever seen.

Aurora is produced when solar radiation particles bombard the earth's atmosphere, and usually only appears in distant northern countries, such as Norway. This time, brilliant auroras can be seen as far away as Oxford and Northumberland. At that time, the night sky showed beautiful colors such as green and purple under the aurora. On the International Space Station, astronauts photographed the green and red aurora.

The recent solar flare was caused by a sunspot named "active area 1302", which can affect the electronic communication between transmission lines and portable devices such as iPhone, but experts say that the strongest explosion has passed. Joe Conches, a scientist at the Space Weather Forecasting Center of the National Oceanic and Atmospheric Administration in Boulder, Colorado, said: "The solar wind with great energy seems to have blown over the earth."

But the solar activity is always unpredictable, and the earth is still at the "shooting point". Dr Ian Griffin, CEO and astronomer of Science Oxford, said in an interview with British media: "Active region 1302 is the source of all the auroras that appeared yesterday, and it may also be the source of some auroras that will appear in the next few nights. According to the space weather forecaster's estimate, there is a 40% probability that there will be a more intense flare in the next 24 hours. When this sunspot passes through the center of the solar disk, any explosion will be aimed at the earth. In the next few nights, the sky without the moon and the active area of the sun will be a very interesting aerial viewing experience for British stargazers. "

Reed-Igram-Weil, an "aurora chaser", said that the aurora over Britain was the most beautiful and impressive one he had ever seen. On the 26th, Weil photographed a series of incredible auroras near the causeway connecting the northeast coast and Lindisfarne, Northumberland. He said: "The most surprising thing about this aurora show is the color, which presents a strange deep purple, while the northern lights are often light green. Purple is also caused by particles from the sun bombarding the atmosphere, but it is obvious that these particles are special. "

Weil said: "At about 9 pm, we set off from Newcastle and drove north for an hour, and found the ideal observation site. We need to find a place without light pollution. At about 10: 30, we arrived in Lindisfarne. It's a long way, but it's obviously worth it. I have been to Norway for 4 times and enjoyed the aurora in Iceland 1 time. This aurora is the most beautiful aurora I have ever seen. "

As the sun enters an active period, aurora will be quite common in the next few years. Dr Tim O 'Brien, from Joo-Derel Bank Observatory of Manchester University, said in an interview with British media: "Solar activity rises and falls, reaching a peak every 1 1 year. Now the sun is entering the next peak, which is undoubtedly good news for the audience of the Northern Lights. The next peak will appear at 20 14, and we still have many opportunities to see the beautiful aurora, but we can't predict it. " According to NASA, sunspots appear when a strong magnetic field reaches the surface of the sun and then cools. Large sunspots can be observed with telescopes and high-performance cameras.