Last night.
Beijing Aurora
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*Netizen @artr**elersr
Weibo with Aurora **.
Call it so"For the second time in Beijing's history
Aurora Image Recording!”
CCTV News,On the evening of December 1, the aurora appeared in Mohe, Tahe and other places in the Daxinganling area of Heilongjiang Province, and many local residents and tourists photographed this beautiful scenery. It is understood that the occurrence of auroras in the Daxinganling area of Heilongjiang Province is due to geomagnetic storm activity.
According to the monitoring of the Space Weather Center of the China Meteorological Administration, on December 1 and 2, geomagnetic storms may occur in ChinaAmong them, a geomagnetic storm of moderate or above or even a geomagnetic storm may occur on December 1, and geomagnetic activity is expected to continue until December 2. Under this influence, the space station may be dragged by the atmosphere and cause the orbital altitude to decreaseThe error of satellite navigation equipment increasesAviation flights will face the double risk of deterioration of the communication environment and radiation across the polar region, for the publicPigeon players and aurora enthusiasts, in particular, should always pay attention to the space weather information in the coming days.
The forecast suggests that the solar eruption is likely to produce a high-intensity and brilliant aurora on December 1Some areas in northern China, such as Heilongjiang and Xinjiang, have the opportunity to see red or even green auroras. It is understood that Mohe City, in the Daxinganling area of Heilongjiang Province, has observed the aurora many times this year.
At 19:57 on the evening of December 1, in the direction of Lingshan Mountain in the northwest of Baihua Mountain, Beijing, Yang Nan, an employee of Baihuashan National Nature Reserve, photographed a rare aurora phenomenon (** in red).
Many netizens said:
Can you shoot the aurora in this dimension?
Really?
I've never seen the aurora in my life!
According to previous reports, magnetic storms occurred from the night of November 5 to the early morning of November 6, and gorgeous auroras appeared in Daxinganling, Heilongjiang, and Xinjiang. Among them, the aurora photographed by Mohe in Heilongjiang is particularly shocking, and the red and green aurora in the picture dance intertwined, with thousands of postures. It is reported that this is the first time that the green aurora dance has been recorded in China.
Aurora is a plasma phenomenon that occurs mainly on planets with magnetic fields and atmospheres. Auroras on Earth are caused by charged energetic particles from the magnetosphere and the solar wind that are carried into the Earth's atmosphere by the geomagnetic field and collide with atoms in the upper atmosphere. The most common color of the aurora is green, but there are also red, purple, etc.
According to @ChinaWeather, due to the low geomagnetic latitude of China, it is difficult to have obvious auroras even when strong geomagnetic activity occurs, but the altitude of the aurora is often 100 kilometers or even 300 to 400 kilometers at an altitude, such a high altitude is enough to cross the horizon of thousands of kilometers, so when the right conditions are encountered, it is possible to see the aurora in the far north of China (such as Xinjiang and Heilongjiang) Especially this time in the north of Beijing, it can also be seen, it is really very lucky!
When you observe, you wantWatch out for the night sky facing north, orIncrease the search range from northeast to northwestAnd just look at the sky above you
What is a geomagnetic storm?As the most typical solar eruption activity, a coronal mass ejection process can throw hundreds of millions of tons of solar material off the surface of the sun at a high speed of hundreds of kilometers per second, not only the kinetic energy of the huge mass and velocity convergence, but also the powerful magnetic field energy of the sun, once it hits the earth, it will cause a change in the direction and magnitude of the geomagnetic field, that is, a geomagnetic storm. With the gradual intensification of magnetic storm activity, the Earth's upper atmosphere is continuously heated, and then expands and spreads into higher space, which creates additional drag for the spacecraft to fly in orbit, produces a deceleration effect similar to dragging, and reduces the orbital altitude of the spacecraft, and the reduction of altitude corresponds to a denser atmospheric environment, which will further bring greater flight resistance, so it is formedFlight speed slows down – altitude decreases – drag is greater – further deceleration – altitude decreases fasterThe vicious circle poses a great threat to the safety of spacecraft.
Geomagnetic storms are not all bad, such as the occurrence of auroras. According to the current change in the number of sunspots, the momentum of future solar activity can be judged2024 remains the high year for solar activity. This means that at least this winter, there is still a possibility of seeing the aurora in the north of our country.
*: CCTV News WeChat, Beijing ** WeChat, China National Geographic Channel Weibo, China Weather Weibo.