Abstract Using the observational data and global ionosphere maps provided by 2 645 stations from six CORS systems, IGS and Center for Orbit Determination in Europe, we restructure the global ionospheric electron density variations during the geomagnetic storm on September 7—8, 2017 by computerized ionospheric tomography. Further analysis finds the two ionospheric disturbance both begin about 1 h after the occurrence of the geomagnetic storm, and decrease with the recovery of the geomagnetic storm, and that there is a strong correlation between the two development trends. Ionospheric disturbance spreads all over the world. In general, the intensity at low-latitude regions is greater than that of medium-high latitude regions, the intensity of middle height region(200-400 km) is greater than that of the lower and upper layers, and the change of electron density is (3.3-9.4)×105 el/cm3. There is still strong ionospheric disturbance in the low latitude area during the first geomagnetic storm recovery phase. In the recovery phase of the second magnetic storm, the ionospheric disturbance shows asymmetry in the north and south hemisphere, the electron density in the northern hemisphere decreased, but increased in the southern hemisphere.
WANG Jinyong,CHEN Biyan,CAO Hengrui. Global Scale Ionospheric Disturbance during the September 7—8, 2017 Geomagnetic Storm[J]. jgg, 2023, 43(12): 1261-1268.
WANG Jinyong,CHEN Biyan,CAO Hengrui. Global Scale Ionospheric Disturbance during the September 7—8, 2017 Geomagnetic Storm[J]. jgg, 2023, 43(12): 1261-1268.