The National Space Weather Monitoring and Warning Center of the China Meteorological Administration released information on the afternoon of December 2
From 17:00 on December 1 to 8:00 on December 2, Beijing time, due to the impact of the solar coronal mass ejection (CME) explosion, there was a 3-hour geomagnetic storm with a KP of 7, a 3-hour KP of 6, and a 9-hour small geomagnetic storm, and the geomagnetic activity is still ongoing.
Affected by geomagnetic storms, auroral activities have occurred in Heilongjiang, Inner Mongolia, Xinjiang and other places in China, and there are clear aurora sightings and observation records in Harbin and even Beijing.
Mohe Aurora Author: Wang Xingze, Cultural and Tourism Office of Amur Forestry Bureau, Daxinganling Forestry Group Company.
The geomagnetic storm caused the orbit of Fengyun-3G to drop by about 300 meters in a single day, reaching nearly four times the orbital attenuation value under normal conditions. Under the accurate forecast service, the satellite operation and control department has made preparations in advance, so the geodetic magnetic storm has little impact on the operation of Fengyun satellite. This is the seventh time this year that there has been geomagnetic activity at the level of a geomagnetic storm, following February 27, March, April and September 19. According to the latest monitoring and forecast, it is under the combined influence of the high-speed solar wind of the solar coronal hole and the CME on December 1A light to moderate magnetic storm is likely on 4 DecemberAstronomer:Magnetic storms have little effect on the health of ordinary people
Cai Zheng, associate professor of the Department of Astronomy of Tsinghua University, explained that magnetic storms are a phenomenon caused by solar activities, in which the high-energy particles emitted by the sun interact with the earth's magnetic field, which will have a certain impact on electronic communication products and have little impact on the health of ordinary people. "In addition to producing beautiful aurora lights at high latitudes, magnetic storms may have other effects on the planet and human activity. According to Cai, magnetic storms may affect the propagation of radio waves, thereby interfering with terrestrial communications and satellite signals, which may affect the accuracy of navigation satellite systems, as well as the signal quality of mobile phones and satellite television. At the same time, strong magnetic storms can have an impact on the power transmission system, increase the current load on the transmission line, and sometimes even cause damage to transformers or other grid facilities, causing power outages. "Magnetic storms can also have an impact on satellite and aviation flights. Cai Zheng said that the high-energy particles produced by magnetic storms can cause damage to satellites in orbit and affect their normal operation, which may lead to data loss or satellite dysfunction. On the other hand, aircraft flying at high latitudes may be exposed to higher levels of radiation due to magnetic storms, and airlines sometimes change routes to reduce radiation exposure for passengers and crew. Cai Zheng said that at present, research on the direct health effects of magnetic storms on human beings is still ongoing, but there are theories that strong geomagnetic activity may affect the migration and navigation ability of animals. "More of the impact could be on astronauts working in environments such as the International Space Station, and increased radiation during magnetic storms could be a safety concern for astronauts, often requiring additional precautions. ”
*: Space Weather WeChat public account People's Daily Science Popularization.
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