The statistical characteristics of the directional changes triggered substorms

0474184 - ÚFA 2018 DE eng A - Abstract
Saxonbergová, Dana - Vörös, Z.
The statistical characteristics of the directional changes triggered substorms.
Geophysical Research Abstracts. Göttingen: European Geosciences Union, 2017. EGU2017-13296-4. ISSN 1607-7962.
[EGU General Assembly 2017. 23.04.2017-28.04.2017, Vienna]
Institutional support: RVO:68378289
Keywords : magnetospheric substorm * triggered substorms * interplanetary magnetic field
Subject RIV: BL - Plasma and Gas Discharge Physics
http://meetingorganizer.copernicus.org/EGU2017/EGU2017-13296-4.pdf

For understanding the magnetospheric substorm onset it is necessary to find out whether substorm onset is always
externally triggered or sometimes is a result of internal processes, which can be observed for example during
northward oriented interplanetary magnetic field i.e. in the time when there is no significant flux transfer. Large
directional changes in the solar wind flow, especially observed during the northward oriented interplanetary magnetic
field, can result in large-scale windsock motion of magnetotail. It can lead to current sheet thinning and force
magnetic reconnection in magnetospheric tail, which consequently can lead to substorm onset.
We analysed case studies of concurrent observations of the solar wind OMNI and Geotail data of distant tail’s
response. We present here a statistical study of the temporal resposes of magnetotail to the vertical directional
changes in the solar wind flow.
Permanent Link: http://hdl.handle.net/11104/0271293