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Chinese Journal of Space Science ›› 2020, Vol. 40 ›› Issue (6): 1007-1013.doi: 10.11728/cjss2020.06.1007

• Research Articles • Previous Articles    

Analysis of Ionospheric Irregularities and Disturbances at Middle and Low Latitudes in China during the Magnetic Storm

MEI Dengkui1, WEN Debao2   

  1. 1 School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114;
    2 School of Geographical Science, Guangzhou University, Guangzhou 510006
  • Received:2019-05-20 Revised:2019-11-03 Published:2020-12-09

Abstract: A strong magnetic storm occurred on 8 September 2017 with the Kp index reaching its maximum of 8. The Regional Ionosphere Maps (RIM) were utilized to analyze the ionospheric TEC (Total Electron Content) disturbances over China and its adjacent areas, and the ROTI (Rate of TEC Index) maps were utilized to analyze the ionospheric irregularities in the low-latitude areas of China during the magnetic storm. Furthermore, the dual-frequency GPS observations of three IGS stations at BJFS (39.6°N, 115.9°E), JFNG (30.5°N, 114.5°E) and HKWS (22.4°N, 114.3°E) were used to obtain the trends of ROTI and DROT (standard deviation of differential ROT) indexes for each station. The results showed that during this magnetic storm, the ionospheric positive phase disturbances dominated in the beginning and mainly occurred at middle-and-low latitudes of China, and the dTEC (differential TEC) reached its maximum of 14.9TECU at about 04:00UT. Then the ionospheric positive phase disturbances gradually declined, the ionospheric negative phase disturbances began to occur at low latitudes of China with the dTEC reaching its minimum of -7.2TECU at about 12:00UT. There were obvious ionospheric irregularities observed at lower latitudes in southern China during 12:30UT-13:30UT. Compared with the BJFS and JFNG stations, the ROTI and DROT indexes of HKWS station at low latitude exhibited instability, indicating the latitudinal differences of ionospheric irregularities.

Key words: Total Electron Content (TEC), ROTI, Ionospheric irregularities, Ionospheric disturbance, Magnetic storm

CLC Number: