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Ionospheric TEC disturbances over China during the strong geomagnetic storm in September 2017
- Source :
- Advances in Space Research. 65:2529-2539
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- From September 7 to 8, 2017, a G4-level strong geomagnetic storm occurred, which seriously impacted on the Earth’s ionosphere. In this work, the global ionospheric maps released by Chinese Academy of Sciences are used to investigate the ionospheric responses over China and its adjacent regions during the strong storm. The prominent TEC enhancements, which mainly associated with the neutral wind and eastward prompt penetration electric field, are observed at equatorial ionization anomaly crests during the main phase of the storm on 8 September 2017. Compared with those on 8 September, the TEC enhancements move to lower-latitude regions during the recovery phase on 9 September. A moderate storm occurred well before the start of the strong storm causes similar middle-latitude TEC enhancements on 7 September. However, the weak TEC depletion is observed at middle and low latitude on 9–10 September, which could be associated with the prevailing westward disturbance electric field or storm-time neural composition changes. In addition, the storm-time RMS and STD values of the ionospheric TEC grids over China increase significantly due to the major geomagnetic storm. The maximum of the RMS reaches 12.0 TECU, while the maximum of the STD reaches 8.3 TECU at ~04UT on 8 September.
- Subjects :
- Geomagnetic storm
Atmospheric Science
Low latitude
010504 meteorology & atmospheric sciences
TEC
Anomaly (natural sciences)
Aerospace Engineering
Astronomy and Astrophysics
Storm
01 natural sciences
Chinese academy of sciences
Geophysics
Space and Planetary Science
Climatology
0103 physical sciences
General Earth and Planetary Sciences
Ionosphere
010303 astronomy & astrophysics
Geology
0105 earth and related environmental sciences
Recovery phase
Subjects
Details
- ISSN :
- 02731177
- Volume :
- 65
- Database :
- OpenAIRE
- Journal :
- Advances in Space Research
- Accession number :
- edsair.doi...........9127f7ddf452e2a7bde980bc18a613b0