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LUO Ji, WEN Bo, WU Kun, LIU Si, XIAO Fuliang, ZHANG Aibin, XU Jiyao, ZHU Yajun. Propagation and Evolution of MSTIDs over the Low-Latitude Region of China during 8 December 2019 (in Chinese). Chinese Journal of Space Science, 2026, 46(5): 1-11 doi: 10.11728/cjss2026.05.2025-0221
Citation: LUO Ji, WEN Bo, WU Kun, LIU Si, XIAO Fuliang, ZHANG Aibin, XU Jiyao, ZHU Yajun. Propagation and Evolution of MSTIDs over the Low-Latitude Region of China during 8 December 2019 (in Chinese). Chinese Journal of Space Science, 2026, 46(5): 1-11 doi: 10.11728/cjss2026.05.2025-0221
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Propagation and Evolution of MSTIDs over the Low-Latitude Region of China during 8 December 2019

doi: 10.11728/cjss2026.05.2025-0221 cstr: 32142.14.cjss.2025-0221
  • 1.

    School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114

  • 2.

    Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near‐Earth Electromagnetic Environments, Changsha University of Science and Technology, Changsha, 410114

  • 3.

    State Key Laboratory of Solar Activity and Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • 4.

    University of Chinese Academy of Sciences, Beijing 100049

  • Received Date: 2025-12-17
  • Rev Recd Date: 2026-02-02
    • Available Online: 2026-02-09
    Abstract
  • This study investigates a nighttime medium-scale traveling ionospheric disturbance (MSTID) event observed over Fuke Station (19.5°N, 109.1°E) in low-latitude China on 8 December 2019, using airglow imaging and Digisonde observations from the Chinese Meridian Project’s Fuke Station, Global Positioning System (GPS) total electron content (TEC) measurements from Beihai Station (21.7°N, 109.2°E), and simulations from the Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIE-GCM). The observations reveal typical northern hemisphere nighttime MSTID structures, characterized by alternating bright and dark bands with northwest–southeast-oriented bands propagating southwestward. During the propagating process, two dark bands exhibited a chasing phenomenon, in which the band that entered the field of view later caught up with the preceding band. The TIE-GCM was used to simulate the nighttime background neutral wind and electron density distribution. The simulation results suggest that the combined effects of spatial variations in the background zonal wind gradient and enhanced electron densities within the low-latitude equatorial ionization anomaly region were primarily responsible for regulating this chasing process. This study provides a theoretical basis for understanding how spatially nonuniform neutral winds and electron density distributions influence MSTID propagation.

     

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