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the reporter learned from the national space weather monitoring and warning center (hereinafter referred to as the "space weather center") that from 9:00 on october 2 to 9:00 on the 3rd, a total of 5 m-class flares broke out on the sun, and the geomagnetic activity was calm to slightly disturbed. south my country ionospheric scintillation appears in the area.

at 21:13 on october 3, a senior engineer from the technology r&d office of the space weather center @spaceweather-ocean released the latest news. at 20:18 on october 3, a flare event broke out in the solar active area 13842, with the peak intensity reaching x9.0 level. large flare level. it is explained that the intensity of solar flares from low to high is a, b, c, m and x. x-class flares are the most intense, and the number indicates its intensity scale.

this is the strongest flare that has erupted on the sun during the 25th solar cycle from 2019 to now.

the space weather center stated that due to the impact of coronal mass ejections on september 30 and october 1, a moderate to large geomagnetic storm may occur on october 4, and a small geomagnetic storm may occur on the 5th; due to the possible outbreak of m-level or above flares, ionospheric disturbances may occur from october 4 to 6. the solar activity level is expected to be moderate to high in the next three days, and there is a high possibility of m-level or higher flares, and ionospheric disturbances may occur.

solar flare activity exhibits a cycle of approximately 11 years. the 25th solar activity cycle began in 2019 and is currently experiencing its rising phase. solar activity will gradually increase over time and will become calm again by the end of the cycle.

a flare is an active phenomenon in which a local area of ​​the solar atmosphere suddenly becomes brighter, which is accompanied by the production of violently enhanced electromagnetic radiation, a large amount of high-energy charged particle flow, and a coronal mass ejection. after the materials and energy ejected from these activities reach the near-earth space, they will strongly disturb the earth's magnetosphere, ionosphere and upper atmosphere, which may affect the performance and safety of satellites, and affect radio communications, power grids, navigation signals, etc. on the earth.