Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51d1971z&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA51D-1971
Physics
[2778] Magnetospheric Physics / Ring Current
Scientific paper
The magnetic field data of the ground stations from INTERMAGNET is used to investigate the ring current distributions along with the magnetic local time. For each event, eight stations located in the geomagnetic longitude evenly are selected to calculate the geomagnetic field component (H) which parallels to the dipole axis. The storm events with different SYMH values show that the H component observation in different MLT regions exhibits dissimilarity during the different storm phases. The majority situation is that there are two extreme values with the one in the dawn side and the other one in the dusk side for the H component observation with the MLT distribution, although there are also some events with the extreme value in the midnight. Using the SYMH index from WDC-C2, 996 storm events are selected during the 23rd solar cycle (1996 ~ 2006) to make the statistical analysis. The storm events are divided into nine different classes. For each class, we study the H component distributions with MLT in main phase and recovery phase. The results show that the magnetic field disturbance during the magnetic storm events is not only related to the symmetrical ring current, but also to the other current such as the partial current. According to the observation from stations, the MLT distributions of partial current for different storm classes and phases are estimated.
Du Aijun
Zhao Xiaopeng
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