[P-EM11] Space Weather and Space Climate

[PEM11-P13] The study of ionospheric storm in China on October 24-25, 2011

*Qingtao Wan¹、Guanyi Ma¹、Jinghua Li¹、Jiangtao Fan¹ (1. National Astronomical Observatories, Chinese Academy of Sciences)

キーワード：ionospheric storm, TEC

An ionospheric storm is studied with the GPS data from the Crustal Movement Observation Network of China (CMONOC) on October 24-25, 2011. The China region is divided into three latitude zones, which are the higher latitude zone (50^oN), mid-latitude zone (40^oN), and the lower latitude zone (30^oN). There is a weak positive ionospheric storm at lower latitudes during 0-4:00 UT on October 25, but there is no obvious TEC enhancement after noontime. For the mid-latitude zone, a strong positive ionospheric storm occurred during the whole day of October 25. For higher latitude zones, a weak positive ionospheric storm is observed in the afternoon of October 25, but there is no TEC enhancement at noontime. Therefore, this ionospheric storm event has a strong impact on the mid-latitudes, while it has a weak impact in the morning and noon at lower latitudes, and only in the afternoon at higher latitudes.